What’s Vulnerable › Vulnerabilities

CVE-2026-109949: FreeRDP 3.0.0 before 3.32.0 PIN Brute-Force via Virtual Smartcard

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-13 · updated 2026-10-21
• Weakness: CWE-307

Description

FreeRDP 3.0.0 before 3.32.0 contains an improper restriction of excessive authentication attempts in its virtual smartcard GIDS implementation, which stores the PIN retry counter per-handle. A malicious RDP server can exhaust the counter with VERIFY APDUs, then request a new SCardConnect to reset attempts, enabling unbounded online brute-forcing of the configured smartcard PIN.

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-chh2-527f-x255
• https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-pin-brute-force-via-virtual-smartcard

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