Security readout for executives and security teams
Plain-English summary
ImageMagick has a medium-severity flaw in its SUN image decoder affecting vulnerable 32-bit builds. A specially crafted image can cause a heap out-of-bounds write, with likely impact to availability and limited confidentiality. Patched versions are available: 7.1.2-15 and 6.9.13-40.
Executive priority
Treat as a targeted remediation item, not an emergency. Prioritize internet-facing or partner-facing image-processing workflows, especially on 32-bit environments. Patch during the next appropriate maintenance window unless the service handles high volumes of untrusted images.
Technical view
CVE-2026-25897 is an integer overflow in ImageMagick’s sun decoder that can lead to an out-of-bounds heap write on 32-bit systems/builds. Affected versions are ImageMagick 7 before 7.1.2-15 and 6 before 6.9.13-40. CVSS 3.1 is 6.5 with high attack complexity and no required privileges.
Likely exposure
Exposure is most relevant where ImageMagick processes untrusted or externally supplied SUN image files on 32-bit systems or 32-bit builds. Common risk areas include image upload, conversion, thumbnailing, and automated media-processing pipelines.
Exploitation context
The source bundle does not indicate active exploitation, and KEV status is false. Exploitation requires a carefully crafted image and appears limited to 32-bit systems/builds. The advisory rates attack complexity as high, but network attack vector and no privileges increase concern for exposed processing services.
Researcher notes
Evidence is limited to the CVE record and GitHub advisory. The issue is specifically described as a SUN decoder integer overflow causing heap out-of-bounds write on 32-bit systems/builds. No public exploit status, workaround, or broader platform impact is provided in the supplied sources.
Mitigation direction
- Upgrade ImageMagick 7.x to 7.1.2-15 or later.
- Upgrade ImageMagick 6.x to 6.9.13-40 or later.
- Prioritize systems processing untrusted images or internet-submitted files.
- If immediate upgrade is not possible, check ImageMagick vendor guidance for supported mitigations.
- Restrict untrusted SUN image processing where operationally feasible.
Validation and detection
- Inventory ImageMagick installations and identify 6.x or 7.x version lines.
- Confirm whether deployments use 32-bit systems or 32-bit ImageMagick builds.
- Identify services that process untrusted or externally uploaded images.
- Verify upgraded systems report patched ImageMagick versions.
- Review image-processing logs for crashes involving SUN image decoding.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2026-25897 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H2.24.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-6j5f-24fw-pqp4CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.