CVE-2026-91951FreeRDP 3.14.0 through 3.30.0 Out-of-bounds Write via urbdrc
Updated under an hour ago ()
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It affects FreeRDP. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in the urbdrc client channel's urb_send_current_frame_number_result() function. A malicious RDP server can send a crafted 28-byte USB redirection message to trigger a 4-byte write past the allocated 16-byte buffer, causing denial of service when verbose asserts are enabled.
- CVSS
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-617
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Sep 20, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
FreeRDP FreeRDP freerdp:freerdp (from the name) | from 3.14.0 before 3.31.0; 3.31.0 not affected | CNA record |
freerdp freerdp freerdp:freerdp | from 3.14.0 before 3.31.0 | NVD |
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-h5w2-q35j-443hvendor-advisory, exploit, mitigation
- https://www.vulncheck.com/advisories/freerdp-3.14.0-through-3.30.0-out-of-bounds-write-via-urbdrcthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.