ZDI-CAN-28546: ZDI-25-1191: (0Day) FontForge PFB File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability
This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of PFB files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current user.
Other sources
This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2025-15273.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-CAN-28546?
The severity of ZDI-CAN-28546 is critical as it allows remote attackers to execute arbitrary code on affected installations of FontForge.
How do I fix ZDI-CAN-28546?
To fix ZDI-CAN-28546, update FontForge to the latest version provided by the vendor to patch the vulnerability.
What are the symptoms of ZDI-CAN-28546 exploitation?
Exploitation of ZDI-CAN-28546 may result in unexpected application behavior, including crashes or arbitrary code execution.
Who is affected by ZDI-CAN-28546?
Users of FontForge are affected by ZDI-CAN-28546 if they open a malicious file or visit a malicious web page.
Is user interaction required for ZDI-CAN-28546?
Yes, user interaction is required for ZDI-CAN-28546 as the target must actively open a malicious file or visit a malicious page.