CVE-2026-109949 FreeRDP 3.0.0 before 3.32.0 PIN Brute-Force via Virtual Smartcard
A malicious RDP server can bypass smartcard PIN retry limits in FreeRDP, enabling unbounded online brute-force attacks against the PIN.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-109949?
CVE-2026-109949 is a high-severity vulnerability in Freerdp Freerdp, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-307
Which versions are affected by CVE-2026-109949?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-109949?
Upgrade to a fixed version.
Is CVE-2026-109949 being exploited?
There is no known exploitation of CVE-2026-109949 in the wild and no public exploit code.
Other vulnerabilities in Freerdp Freerdp
- CVE-2021-37594 Other in n/a
- CVE-2021-37595 Other in n/a
- CVE-2026-67305 FreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdr
- CVE-2026-66402 FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass
- CVE-2026-67289 FreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection
Sources
Also known as DEBIAN-CVE-2026-109949, GHSA-chh2-527f-x255, GHSA-crc5-wg2m-q745, UBUNTU-CVE-2026-109949.