CVE-2026-21684
Published: 07 January 2026
Summary
CVE-2026-21684 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?
Vulnerability enables DoS via crafted malicious ICC profile file requiring user interaction to open/process, directly mapping to malicious file execution and application exploitation for endpoint DoS.
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 `CIccTagSpectralViewingConditions()`. 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-2026-21684 is an Undefined Behavior vulnerability in the `CIccTagSpectralViewingConditions()` function 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 versions of iccDEV prior to 2.3.1.2 and impacts any users or applications that process ICC color profiles using this library. The issue is linked to CWE-20 (Improper Input Validation) and CWE-758.
Remote attackers can exploit this vulnerability with low complexity and no privileges required, but it necessitates user interaction, such as tricking a user into opening or processing a malicious ICC color profile. Successful exploitation results in no confidentiality impact, low integrity impact, and high availability impact, with an overall CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H). This could lead to application crashes, denial of service, or other disruptions due to the undefined behavior triggered in the affected function.
The patch is available in iccDEV version 2.3.1.2, as detailed in the project's GitHub security advisory (GHSA-fg9m-j9x8-8279), issue tracker (#216), and pull request (#225). No known workarounds exist for vulnerable versions.
Details
- CWE(s)