Deserialization of Untrusted Data in FontForge - CVE-2025-15276
Published: January 8, 2026 / Updated: January 8, 2026
Vulnerability identifier: #VU121101
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-15276
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data. A remote attacker can trick a victim to open a specially crafted SFD file and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
FontForge
How to mitigate CVE-2025-15276
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.