CVE-2026-22855
CRITICALCVSS 9.1/10EPSS 0.76%
Last modified
CVE-2026-22855 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when cbAttrLen does not match the actual NDR buffer length. EPSS estimates a 0.76% chance of exploitation in the next 30 days.
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when cbAttrLen does not match the actual NDR buffer length. This vulnerability is fixed in 3.20.1.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Freerdp | Freerdp | < 3.20.1 |
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rwp3-g84r-6mx9Exploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-22855?
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when cbAttrLen does not match the actual NDR buffer length. This vulnerability is fixed in 3.20.1.
How severe is CVE-2026-22855?
CVE-2026-22855 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.
How do I fix CVE-2026-22855?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-22855?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST