# What is CVE-2025-21479?

> CVE-2025-21479 is a high-severity flaw (CVSS 8.6) in Aqt1000 Firmware from Qualcomm, published on 3 June 2025. 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 0.8%. If you run an affected version, patch it first.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2025-21479

## 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:** 75 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:** 0.8% (latest exploit-likelihood forecast)
- **Published:** 3 June 2025
- **Record last updated:** 28 October 2025
- **Main product:** Aqt1000 Firmware from Qualcomm
- **Affected products:** 75

## What is CVE-2025-21479? In plain terms

An attacker has to be already on the device without logging in, but a person has to take an action first. If it works, the attacker can read data, change data and take it offline.

### The official description

Memory corruption due to unauthorized command execution in GPU micronode while executing specific sequence of commands.

### What kind of flaw is it?

- CWE-863: Incorrect Authorization

### How an attack on it works

- Where an attacker can be: Already on the device
- How hard it is to pull off: Easy: no special conditions
- Login needed first: No login needed
- Does someone have to click: Yes, a person has to take an action
- What an attacker gets: Can read data, change data and take it offline

Severity vector: `CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`

## Is CVE-2025-21479 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 0.8%.

Exploit likelihood over the last 7 days: 0.8%, 0.8%, 0.8%, 0.8%, 0.8%, 0.8%, 0.8%.

### Timeline

- 3 June 2025: Published
- 9 June 2025: Added to the known-exploited list
- 28 October 2025: Record last updated

### How Precursor Intelligence ranks it

CVE-2025-21479 scores **75 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-2025-21479?

The published record lists 75 products.

- [Aqt1000 Firmware](https://www.precursorintelligence.com/product/qualcomm/aqt1000_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Fastconnect 6200 Firmware](https://www.precursorintelligence.com/product/qualcomm/fastconnect_6200_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Fastconnect 6700 Firmware](https://www.precursorintelligence.com/product/qualcomm/fastconnect_6700_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Fastconnect 6800 Firmware](https://www.precursorintelligence.com/product/qualcomm/fastconnect_6800_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Fastconnect 6900 Firmware](https://www.precursorintelligence.com/product/qualcomm/fastconnect_6900_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Fastconnect 7800 Firmware](https://www.precursorintelligence.com/product/qualcomm/fastconnect_7800_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Qca6391 Firmware](https://www.precursorintelligence.com/product/qualcomm/qca6391_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Qcm4490 Firmware](https://www.precursorintelligence.com/product/qualcomm/qcm4490_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Qcs4490 Firmware](https://www.precursorintelligence.com/product/qualcomm/qcs4490_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sd855 Firmware](https://www.precursorintelligence.com/product/qualcomm/sd855_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm4635 Firmware](https://www.precursorintelligence.com/product/qualcomm/sm4635_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm6250 Firmware](https://www.precursorintelligence.com/product/qualcomm/sm6250_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm6650 Firmware](https://www.precursorintelligence.com/product/qualcomm/sm6650_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm6650p Firmware](https://www.precursorintelligence.com/product/qualcomm/sm6650p_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm7325p Firmware](https://www.precursorintelligence.com/product/qualcomm/sm7325p_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm7635 Firmware](https://www.precursorintelligence.com/product/qualcomm/sm7635_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm7675 Firmware](https://www.precursorintelligence.com/product/qualcomm/sm7675_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm7675p Firmware](https://www.precursorintelligence.com/product/qualcomm/sm7675p_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm8550p Firmware](https://www.precursorintelligence.com/product/qualcomm/sm8550p_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm8635 Firmware](https://www.precursorintelligence.com/product/qualcomm/sm8635_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm8635p Firmware](https://www.precursorintelligence.com/product/qualcomm/sm8635p_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sm8650q Firmware](https://www.precursorintelligence.com/product/qualcomm/sm8650q_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 4 Gen 1 Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_4_gen_1_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 460 Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_460_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 480 5g Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_480_5g_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- Snapdragon 480+ 5g Mobile Platform (sm4350-Ac) Firmware by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 662 Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_662_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 680 4g Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_680_4g_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- Snapdragon 685 4g Mobile Platform (sm6225-Ad) Firmware by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 690 5g Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_690_5g_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 695 5g Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_695_5g_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 720g Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_720g_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 778g 5g Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_778g_5g_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- Snapdragon 778g+ 5g Mobile Platform (sm7325-Ae) Firmware by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- Snapdragon 782g Mobile Platform (sm7325-Af) Firmware by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- Snapdragon 7c+ Gen 3 Compute Firmware by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 8 Gen 2 Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_8_gen_2_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 8 Gen 3 Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_8_gen_3_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- Snapdragon 8+ Gen 2 Mobile Platform Firmware by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 855 Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_855_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- Snapdragon 855+/860 Mobile Platform (sm8150-Ac) Firmware by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 865 5g Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_865_5g_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- Snapdragon 865+ 5g Mobile Platform (sm8250-Ab) Firmware by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- Snapdragon 870 5g Mobile Platform (sm8250-Ac) Firmware by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon 888 5g Mobile Platform Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_888_5g_mobile_platform_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- Snapdragon 888+ 5g Mobile Platform (sm8350-Ac) Firmware by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon Ar1 Gen 1 Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_ar1_gen_1_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- Snapdragon Ar1 Gen 1 Platform "luna1" Firmware by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Snapdragon X55 5g Modem-Rf System Firmware](https://www.precursorintelligence.com/product/qualcomm/snapdragon_x55_5g_modem-rf_system_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sxr2230p Firmware](https://www.precursorintelligence.com/product/qualcomm/sxr2230p_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sxr2250p Firmware](https://www.precursorintelligence.com/product/qualcomm/sxr2250p_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Sxr2330p Firmware](https://www.precursorintelligence.com/product/qualcomm/sxr2330p_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcd9341 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcd9341_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcd9370 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcd9370_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcd9375 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcd9375_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcd9378 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcd9378_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcd9380 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcd9380_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcd9385 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcd9385_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcd9390 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcd9390_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcd9395 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcd9395_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcn3950 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcn3950_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcn3988 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcn3988_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcn6450 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcn6450_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcn6650 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcn6650_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcn6755 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcn6755_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcn7861 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcn7861_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wcn7881 Firmware](https://www.precursorintelligence.com/product/qualcomm/wcn7881_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wsa8810 Firmware](https://www.precursorintelligence.com/product/qualcomm/wsa8810_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wsa8815 Firmware](https://www.precursorintelligence.com/product/qualcomm/wsa8815_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wsa8830 Firmware](https://www.precursorintelligence.com/product/qualcomm/wsa8830_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wsa8832 Firmware](https://www.precursorintelligence.com/product/qualcomm/wsa8832_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wsa8835 Firmware](https://www.precursorintelligence.com/product/qualcomm/wsa8835_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wsa8840 Firmware](https://www.precursorintelligence.com/product/qualcomm/wsa8840_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wsa8845 Firmware](https://www.precursorintelligence.com/product/qualcomm/wsa8845_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified
- [Wsa8845h Firmware](https://www.precursorintelligence.com/product/qualcomm/wsa8845h_firmware) by [Qualcomm](https://www.precursorintelligence.com/vendors/qualcomm) (Operating system): version not specified

## How do I fix CVE-2025-21479?

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

- [docs.qualcomm.com](https://docs.qualcomm.com/product/publicresources/securitybulletin/june-2025-bulletin.html) (Vendor advisory)
- [cisa.gov](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21479) (Government resource)

## Questions

### What is CVE-2025-21479?

CVE-2025-21479 is a high-severity flaw in Aqt1000 Firmware from Qualcomm, published on 3 June 2025. An attacker has to be already on the device without logging in, but a person has to take an action first. If it works, the attacker can read data, change data and take it offline.

### How serious is CVE-2025-21479?

It scores 8.6 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2025-21479 is 75 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-2025-21479 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 0.8%.

### Which versions does CVE-2025-21479 affect?

For Aqt1000 Firmware from Qualcomm: version not specified. The record lists 75 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2025-21479?

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-2025-21479 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.

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