Medium 6.5Published Sep 15, 2026

CVE-2026-91959FreeRDP before 3.31.0 Buffer Over-read via RTS Gateway

Updated under an hour ago (2026-10-19 09:50 UTC)

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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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Every CVE for FreeRDP

Exploited in the last 30 days

FreeRDP before 3.31.0 contains a buffer over-read vulnerability in the rts_read_result function within the RPC gateway transport parser. Attackers can send a malicious BIND_ACK PDU with a truncated result entry to trigger an out-of-bounds read causing process abort.

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-125
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

Affected products

FreeRDP FreeRDP freerdp:freerdp (from the name)	before 3.31.0; 3.31.0 not affected	CNA record
freerdp freerdp freerdp:freerdp	before 3.31.0	NVD

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-pj8w-fh79-f438vendor-advisory, exploit, mitigation
https://www.vulncheck.com/advisories/freerdp-before-3.31.0-buffer-over-read-via-rts-gatewaythird-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.