Heap-based buffer overflow in FreeRDP - CVE-2026-33987
Published: April 8, 2026
Vulnerability identifier: #VU125366
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-33987
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeRDP
Affected software:
FreeRDP
FreeRDP
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service or modify data.
The vulnerability exists due to a heap-based buffer overflow in persistent_cache_read_entry_v3() in libfreerdp/cache/persistent.c when processing a crafted .bmc persistent cache file. A remote attacker can provide a specially crafted cache file to cause a denial of service or modify data.
User interaction is required to open or process the crafted persistent cache file.
How to mitigate CVE-2026-33987
Install security update from vendor's website.