# What is CVE-2026-104935? > CVE-2026-104935 is a high-severity flaw (CVSS 8.6) in Connect Secure from Ivanti, published on 13 October 2026. It is on the list of flaws known to be exploited, so criminals are already using it. The latest forecast puts its chance of use in the next 30 days at 26%. If you run an affected version, patch it first. Canonical page: https://www.precursorintelligence.com/what-is/cve-2026-104935 ## At a glance - **Verdict:** Fix this now. Attackers are using this flaw today. If you run an affected version, it goes to the top of your list. - **Precursor Intelligence risk score:** 77 out of 100 (High); action: Emergency patch. Kept up to date as the evidence changes. - **Severity:** High (CVSS 8.6 out of 10) - **Known to be exploited:** Yes, it is on the government list of flaws known to be exploited - **Chance of use in the next 30 days:** 26% (latest exploit-likelihood forecast) - **Published:** 13 October 2026 - **Record last updated:** 13 October 2026 - **Main product:** Connect Secure from Ivanti - **Affected products:** 1 ## What is CVE-2026-104935? In plain terms It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read data. ### The official description Authentication bypass by spoofing in ICS before version 25.1.3.0 allows a remote unauthenticated attacker to execute arbitrary commands. This does not impact ICS version 22.7R2.14 or prior. ### What kind of flaw is it? - CWE-290: Authentication Bypass by Spoofing ### How an attack on it works - Where an attacker can be: Anywhere on the internet - How hard it is to pull off: Easy: no special conditions - Login needed first: No login needed - Does someone have to click: No, nobody has to do anything - What an attacker gets: Can read data Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L` ## Is CVE-2026-104935 being exploited? Yes Attackers are already using it. It is on the government list of flaws known to be exploited, and the latest forecast puts the chance of it being used in the next 30 days at 26%. Exploit likelihood over the last 7 days: <0.1%, <0.1%, <0.1%, <0.1%, 26%, 26%, 26%. ### Timeline - 13 October 2026: Published - 14 October 2026: Added to the known-exploited list ### How Precursor Intelligence ranks it CVE-2026-104935 scores **77 out of 100 (High)**, with the action "Emergency patch". 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: smaller factor - Threat activity around it: smaller factor 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-2026-104935? The published record lists 1 product. Versions are as published: "25.1.0.0 to before 25.1.1.2" means from 25.1.0.0 up to, but not including, 25.1.1.2. - [Connect Secure](https://www.precursorintelligence.com/product/ivanti/connect_secure) by [Ivanti](https://www.precursorintelligence.com/vendors/ivanti) (Application): 22.8-r2, 22.8-r2.1, 22.8-r2.2, 22.8-r2.3, 22.8-r2.4, 25.1.0.0 to before 25.1.1.2, 25.1.2.0 to before 25.1.3.0 ## How do I fix CVE-2026-104935? 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. **Check it wasn’t used before you patched.** Because criminals are already using this flaw, look for signs of a break-in on affected systems using the vendor’s guidance. ### References - [hub.ivanti.com](https://hub.ivanti.com/s/article/Security-Advisory-Ivanti-Connect-Secure-CVE-2026-104935) (Vendor advisory) - [cisa.gov](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-104935) (Government resource) ## Questions ### What is CVE-2026-104935? CVE-2026-104935 is a high-severity flaw in Connect Secure from Ivanti, published on 13 October 2026. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read data. ### How serious is CVE-2026-104935? It scores 8.6 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2026-104935 is 77 out of 100, which is High. Its action is "Emergency patch". Attackers are using this flaw today. If you run an affected version, it goes to the top of your list. ### Is CVE-2026-104935 being exploited? Attackers are already using it. It is on the government list of flaws known to be exploited, and the latest forecast puts the chance of it being used in the next 30 days at 26%. ### Which versions does CVE-2026-104935 affect? For Connect Secure from Ivanti: 22.8-r2, 22.8-r2.1, 22.8-r2.2, 22.8-r2.3, 22.8-r2.4, 25.1.0.0 to before 25.1.1.2 and 1 more. ### How do I fix CVE-2026-104935? 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. Because criminals are already using it, also check affected systems for signs of a break-in. ## Does CVE-2026-104935 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