Vulnerability details
CVE-2026-121392
FreeRDP FreeRDP
FreeRDP before 3.32.2 Certificate Identity Validation Bypass via tls_verify_certificate
CVSS 4.0
9.1Critical
Official description
FreeRDP before 3.32.2 contains an improper certificate validation vulnerability in tls_verify_certificate() that accepts Common Name fallback despite non-matching SAN entries and matches IP literals against DNS strings. Man-in-the-middle attackers holding a certificate from a client-trusted CA can bypass server identity checks to intercept RDP sessions, including keystrokes, clipboard, and screen content.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.1Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| 7.4High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| FreeRDP | FreeRDP | v < 3.32.2 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-11-03
- Last updated
- 2026-11-03
- State
- Published
- Assigner (CNA)
- VulnCheck
- Kolun priority
- 15 · Low
Exploit prediction (EPSS)
0.16%
Probability of exploitation in 30 days
5.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-295Improper Certificate Validation