What’s Vulnerable › Vulnerabilities

CVE-2026-73242: FreeRDP: Kerberos GSS Wrap-token `EC` field is unbounded, causing an out-of-bounds decrypt in `kerberos_DecryptMessage`

• Severity: critical (CVSS 9.1 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: 2026-08-11 · updated 2026-09-25
• Weakness: CWE-122

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.30.0, FreeRDP's winpr/libwinpr/sspi/Kerberos/kerberos.c kerberos_DecryptMessage function fails to bound the peer-controlled GSS Wrap-token EC field before using it with RRC in IOV pointer offsets, allowing a malicious RDP peer to trigger out-of-bounds reads and in-place writes during CredSSP/NLA Kerberos decryption. This issue is fixed in version 3.30.0.

Affected products

• FreeRDP: before 3.30.0 — fixed in 3.30.0

How to fix

Upgrade to a fixed version: FreeRDP 3.30.0. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP/commit/0adf5e30d01be84e190a359a7bdd37bc51d740cc
• https://github.com/FreeRDP/FreeRDP/pull/13065
• https://github.com/FreeRDP/FreeRDP/releases/tag/3.30.0
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vv64-95pc-vj9v
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vv64-95pc-vj9v

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