Double Free Vulnerability in FreeRDP Affects Unauthenticated Clients
CVE-2026-121956

8.7HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
4 November 2026

What is CVE-2026-121956?

FreeRDP prior to version 3.32.2 is susceptible to a double free vulnerability within its WinPR Kerberos SSPI retrieveSomeTgt function. This flaw allows unauthenticated remote clients to craft a malicious NLA/CredSSP u2u TGT request. Such a request can include an attacker-controlled server name with an '@' character, leading to heap corruption and potential crashes of the server process. This vulnerability poses significant risks to system stability and could be exploited to disrupt services.

Affected Version(s)

FreeRDP 0 < 3.32.2

FreeRDP 3.32.2

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/freerdp-before-3.32....
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

smaeljaish771
KeenSecurityLab
.