CVE-2025-15272Network attack vector

Code execution via unchecked SFD data length

Published Dec 31, 2025 · Updated Dec 31, 2025

Heap-based buffer overflow in FontForge allows remote attackers to execute code in the current user's context via a crafted SFD file. The SFD parser copies user-supplied data into a heap buffer without first validating that the supplied length fits the destination. Exploitation requires the target to open the malicious file or visit a page that causes FontForge to process it; successful exploitation runs code with the target user's privileges.

CVSS severity8.8
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Heap-based buffer overflow in FontForge allows remote attackers to execute code in the current user's context via a crafted SFD file. The SFD parser copies user-supplied data into a heap buffer without first validating that the supplied length fits the destination. Exploitation requires the target to open the malicious file or visit a page that causes FontForge to process it; successful exploitation runs code with the target user's privileges.

The record

CVE
CVE-2025-15272
Published
Dec 31, 2025
Updated
Dec 31, 2025
Vendor
FontForge
Product
FontForge
Classifications
CWE-122, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 31, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=aca4f524c6cb14cdc7bc4cd493492a33f5154797

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FontForge · FontForgeversion=aca4f524c6cb14cdc7bc4cd493492a33f5154797

Published CVSS scores

8.8Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo