# What is CVE-2026-20534? > CVE-2026-20534 is a medium-severity flaw (CVSS 5.3) in Mt2716 Firmware from Mediatek, published on 5 October 2026. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 0.2%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2026-20534 ## At a glance - **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle. - **Precursor Intelligence risk score:** 24 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 5.3 out of 10) - **Known to be exploited:** No, not on the list of flaws known to be exploited today - **Chance of use in the next 30 days:** 0.2% (latest exploit-likelihood forecast) - **Published:** 5 October 2026 - **Record last updated:** 9 October 2026 - **Main product:** Mt2716 Firmware from Mediatek - **Affected products:** 83 ## What is CVE-2026-20534? In plain terms An attacker has to be on the same local network without logging in, and nobody has to click anything. If it works, the attacker can take it offline. ### The official description In Modem, there is a possible out of bounds read due to an incorrect bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01797547; Issue ID: MSV-9155. ### What kind of flaw is it? - CWE-125: Out-of-bounds Read ### How an attack on it works - Where an attacker can be: On the same local network - How hard it is to pull off: Hard: conditions must line up - Login needed first: No login needed - Does someone have to click: No, nobody has to do anything - What an attacker gets: Can take it offline Severity vector: `CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H` ## Is CVE-2026-20534 being exploited? Not that we know of It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.2%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 0.2%, 0.2%, 0.2%, 0.2%, 0.2%, 0.2%, 0.2%. ### Timeline - 5 October 2026: Published - 9 October 2026: Record last updated ### How Precursor Intelligence ranks it CVE-2026-20534 scores **24 out of 100 (Low)**, with the action "Monitor". Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less: - Evidence it is being exploited: biggest factor - How severe it is: strong factor - How widely exposed it is: key context - Real threat activity around it: key context 85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it. ## Who is affected by CVE-2026-20534? The published record lists 83 products. - [Mt2716 Firmware](https://www.precursorintelligence.com/product/mediatek/mt2716_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt2735 Firmware](https://www.precursorintelligence.com/product/mediatek/mt2735_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt2737 Firmware](https://www.precursorintelligence.com/product/mediatek/mt2737_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6739 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6739_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6761 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6761_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6762 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6762_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6763 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6763_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6765 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6765_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6767 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6767_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6768 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6768_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6769 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6769_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6771 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6771_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6779 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6779_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6781 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6781_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6783 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6783_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6785 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6785_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6789 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6789_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6813 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6813_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6815 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6815_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6833 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6833_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6835 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6835_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6853 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6853_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6855 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6855_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6858 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6858_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6873 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6873_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6875 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6875_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6877 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6877_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6878 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6878_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6879 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6879_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6880 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6880_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6881 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6881_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6883 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6883_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6885 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6885_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6886 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6886_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6889 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6889_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6890 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6890_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6891 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6891_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6893 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6893_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6895 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6895_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6896 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6896_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6897 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6897_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6899 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6899_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6980 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6980_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6982 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6982_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6983 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6983_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6985 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6985_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6986 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6986_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6988 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6988_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6989 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6989_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6990 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6990_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6991 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6991_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt6993 Firmware](https://www.precursorintelligence.com/product/mediatek/mt6993_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8666 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8666_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8667 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8667_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8668 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8668_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8673 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8673_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8675 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8675_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8676 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8676_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8678 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8678_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8755 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8755_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8765 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8765_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8766 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8766_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8766r Firmware](https://www.precursorintelligence.com/product/mediatek/mt8766r_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8768 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8768_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8771 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8771_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8775 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8775_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8781 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8781_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8786 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8786_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8788 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8788_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8788e Firmware](https://www.precursorintelligence.com/product/mediatek/mt8788e_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8789 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8789_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8791 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8791_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8791t Firmware](https://www.precursorintelligence.com/product/mediatek/mt8791t_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8792 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8792_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8793 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8793_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8795t Firmware](https://www.precursorintelligence.com/product/mediatek/mt8795t_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8796 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8796_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8797 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8797_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8798 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8798_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8863 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8863_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8873 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8873_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8883 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8883_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified - [Mt8893 Firmware](https://www.precursorintelligence.com/product/mediatek/mt8893_firmware) by [Mediatek](https://www.precursorintelligence.com/vendors/mediatek) (Operating system): version not specified ## How do I fix CVE-2026-20534? 1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list. 2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisory first in the list. 3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in. 4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood. ### References - [mediatek.com](https://www.mediatek.com/product-security-bulletin/October-2026) (Vendor advisory) ## Questions ### What is CVE-2026-20534? CVE-2026-20534 is a medium-severity flaw in Mt2716 Firmware from Mediatek, published on 5 October 2026. An attacker has to be on the same local network without logging in, and nobody has to click anything. If it works, the attacker can take it offline. ### How serious is CVE-2026-20534? It scores 5.3 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2026-20534 is 24 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2026-20534 being exploited? It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.2%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2026-20534 affect? For Mt2716 Firmware from Mediatek: version not specified. The record lists 83 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2026-20534? Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2026-20534 affect you? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact