What’s Vulnerable › Vulnerabilities

CVE-2026-109255: FreeRDP 3.0.0 before 3.32.0 heap buffer overflow via license_check_stream_length

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-12 · updated 2026-10-15
• Weakness: CWE-122

Description

FreeRDP 3.0.0 before 3.32.0 contains an integer truncation vulnerability in license_check_stream_length that allows a malicious RDP server to trigger a heap buffer overflow on 32-bit clients. Attackers can send a crafted SERVER_LICENSE_REQUEST with a large scopeCount that bypasses length checks, causing out-of-bounds writes leading to denial of service or remote code execution.

Affected products

• FreeRDP: from 3.0.0 before 3.32.0 — fixed in 3.32.0

How to fix

Upgrade to a fixed version: FreeRDP 3.32.0. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hxw3-57rq-3v4m
• https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-heap-buffer-overflow-via-license-check-stream-length
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hxw3-57rq-3v4m

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