CVE-2025-1052Network attack vector

Code execution via unchecked sixel pixel offsets

Published Feb 11, 2025 · Updated Feb 12, 2025

Heap-based buffer overflow in Mintty 3.7.1 allows remote attackers to execute code via a crafted sixel image. The sixel_parser_parse function derives pixel offsets from image dimensions, cursor position, and repeat count, then writes color indexes to image->data without verifying that each offset remains within the allocated buffer. Exploitation requires the current user to visit a malicious page or open a malicious file, and successful code runs in that user's context.

CVSS severity8.8
High
EPSS probability0.97%
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 Mintty 3.7.1 allows remote attackers to execute code via a crafted sixel image. The sixel_parser_parse function derives pixel offsets from image dimensions, cursor position, and repeat count, then writes color indexes to image->data without verifying that each offset remains within the allocated buffer. Exploitation requires the current user to visit a malicious page or open a malicious file, and successful code runs in that user's context.

The record

CVE
CVE-2025-1052
Published
Feb 11, 2025
Updated
Feb 12, 2025
Vendor
Mintty
Product
Mintty
Classifications
CWE-122, CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 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=3.7.1 (Git-2.45.1-64-bit.exe)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mintty · Minttyversion=3.7.1 (Git-2.45.1-64-bit.exe)

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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
CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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