CVE-2025-15273
Unknown Unknown - Not Provided
Stack-Based Buffer Overflow in FontForge PFB Parsing Enables RCE

Publication date: 2025-12-31

Last updated on: 2025-12-31

Assigner: Zero Day Initiative

Description
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. Was ZDI-CAN-28546.
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Meta Information
Published
2025-12-31
Last Modified
2025-12-31
Generated
2026-06-16
AI Q&A
2025-12-31
EPSS Evaluated
2026-06-15
NVD
CVE-2025-15273
EUVD
EUVD-2025-205894
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
fontforge fontforge *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
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Executive Summary

CVE-2025-15273 is a remote code execution vulnerability in FontForge caused by improper validation of the length of user-supplied data when parsing PFB (Printer Font Binary) files. This flaw leads to a stack-based buffer overflow, allowing an attacker to execute arbitrary code with the privileges of the current user. Exploitation requires user interaction, such as opening a malicious file or visiting a malicious webpage. [1]

Impact Analysis

This vulnerability can allow remote attackers to execute arbitrary code on your system with the privileges of the current user. This could lead to unauthorized actions such as installing malware, stealing data, or taking control of the affected system. Since exploitation requires user interaction, the risk arises when a user opens a malicious file or visits a malicious webpage. [1]

Mitigation Strategies

To mitigate this vulnerability, avoid opening untrusted or suspicious PFB files and do not visit untrusted webpages that might exploit this flaw. Ensure that your FontForge installation is updated with any patches or security updates provided by the vendor once available. Additionally, consider restricting user permissions to limit the impact of potential exploitation. [1]

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