CVE-2026-66401
Low
No strong exploitation signal.
CVSS base
2.1
LOW
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
EPSS — probability of exploitation (30 days)
0.2%
10.7th percentile
CISA KEV
Not listed
Weakness / dates
CWE-125
Published 2026-08-01 · modified 2026-09-03
CVSS breakdown
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
| Attack Vector | P | Physical |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | R | Required |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | N | None |
| Availability | L | Low |
Timeline
- 2026-08-01 — Published (NVD)
- 2026-09-03 — Last modified (NVD)
Description
FreeRDP before 3.29.0 contains an out-of-bounds heap read vulnerability in the UVC H.264 extension-unit parser that fails to validate descriptor length before accessing the GUID field. A local attacker with a malicious USB video camera can trigger a heap read beyond allocated bounds during camera stream setup, causing denial of service.
Affected
References
- https://github.com/FreeRDP/FreeRDP/commit/5044d5390035c6fd9a36ad885192d97d21e8a92d
- exploit https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8jj2-67pg-j6mg
- https://www.vulncheck.com/advisories/freerdp-before-out-of-bounds-read-via-uvc-h-264
- exploit https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8jj2-67pg-j6mg