CVE-2026-21687
Published: 07 January 2026
Summary
CVE-2026-21687 is a high-severity Improper Input Validation (CWE-20) vulnerability in Color Iccdev. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Malicious File (T1204.002); ranked at the 27.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2026-21687 is an Undefined Behavior vulnerability in the `CIccTagCurve::CIccTagCurve()` constructor within the iccDEV library, a set of libraries and tools for interacting with, manipulating, and applying International Color Consortium (ICC) color management profiles. It affects iccDEV versions prior to 2.3.1.2 and impacts users of the library who process ICC color profiles.
The vulnerability carries a CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H), associated with CWE-20 (Improper Input Validation) and CWE-758 (Reliance on Undefined, Unspecified, or Implementation-Defined Behavior). Remote attackers require no privileges and can exploit it over the network with low complexity, but user interaction is needed, such as opening or processing a specially crafted ICC profile. Exploitation can result in low integrity impact and high availability impact, such as denial-of-service via crashes.
Mitigation is provided in iccDEV version 2.3.1.2, which contains a patch for the issue. No known workarounds are available. Further details are documented in the GitHub security advisory at GHSA-prmm-g479-4fv7, issue tracker #180, and pull request #221.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-1393
Vulnerability details
iccDEV provides a set of libraries and tools that allow for the interaction, manipulation, and application of International Color Consortium (ICC) color management profiles. Versions prior to 2.3.1.2 have Undefined Behavior in `CIccTagCurve::CIccTagCurve()`. This vulnerability affects users of the iccDEV…
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library who process ICC color profiles. Version 2.3.1.2 contains a patch. No known workarounds are available.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Crafted ICC profile file processed by user triggers UB/crash in library (UI:R, file-based trigger).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation of ICC profile inputs to the CIccTagCurve constructor, eliminating the malformed data that triggers CWE-20 and CWE-758 undefined behavior.
Mandates timely application of the vendor patch in version 2.3.1.2 that removes the undefined behavior from the constructor.
Requires the library to handle malformed ICC profile data gracefully instead of allowing undefined behavior that produces crashes.