CVE-2026-21686
Published: 07 January 2026
Summary
CVE-2026-21686 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?
Malicious ICC profile file requires user execution (T1204.002) to trigger UB/crash; enables application DoS via exploitation (T1499.004).
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 `CIccTagLutAtoB::Validate()`. 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-2026-21686 is an Undefined Behavior vulnerability in the `CIccTagLutAtoB::Validate()` function within the iccDEV library, affecting versions prior to 2.3.1.2. The iccDEV library provides tools and libraries for interacting with, manipulating, and applying International Color Consortium (ICC) color management profiles. This flaw impacts users of the iccDEV library who process ICC color profiles and is associated with CWE-20 (Improper Input Validation) and CWE-758 (Reliance on Undefined, Unspecified, or Implementation-Defined Behavior).
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). A remote attacker requires no privileges and can exploit it with low attack complexity by tricking a user into processing a specially crafted ICC color profile, such as via user interaction like opening a malicious file. Successful exploitation can result in high availability impact, such as application crashes or denial of service, low integrity impact, and no confidentiality loss.
Version 2.3.1.2 of iccDEV includes a patch addressing this issue, with no known workarounds available. Mitigation details and the fix are documented in the project's GitHub repository, including issue #214, pull request #222, and security advisory GHSA-792q-cqq9-mq4x.
Details
- CWE(s)