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 39.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Security testing and developer training directly verify and enforce proper input validation, reducing exploitability of injection and malformed-data weaknesses.
Security testing and evaluation at multiple SDLC stages directly detects missing or flawed input validation, with the required remediation process ensuring fixes are applied.
Directly implements checks on information inputs to reject invalid data before processing.
Spam protection mechanisms perform filtering and detection on inbound/outbound messages, directly compensating for missing or weak input validation of unsolicited content.
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).
NVD Description
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.
Deeper analysisAI
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.
Details
- CWE(s)