What is the CVSS score of CVE-2026-21687?

CVE-2026-21687 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H. EPSS exploitation probability: 0.1%.

Which versions of Iccdev are affected by CVE-2026-21687?

CVE-2026-21687 presents moderate security risk, a input validation vulnerability rated CVSS 7.1. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2026-21687?

Yes, a public proof-of-concept exploit is available for CVE-2026-21687. Prioritise patching immediately. EPSS: 0.1%.

Iccdev CVE-2026-21687

HIGH

Improper Input Validation (CWE-20)

2026-01-07 security-advisories@github.com

Code Injection Iccdev

7.1

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.1 HIGH

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 12, 2026 - 18:14 vuln.today

Public exploit code

Patch released

Jan 12, 2026 - 18:14 nvd

Patch available

CVE Published

Jan 07, 2026 - 22:15 nvd

HIGH 7.1

DescriptionGitHub Advisory

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 library who process ICC color profiles. Version 2.3.1.2 contains a patch. No known workarounds are available.

AnalysisAI

iccDEV versions before 2.3.1.2 contain undefined behavior in the CIccTagCurve constructor that allows attackers to cause denial of service or data integrity issues when processing malicious ICC color profiles. The vulnerability requires user interaction to trigger and affects anyone using the library to handle color management profiles, with public exploit code already available. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Craft malicious ICC color profile

Exploit

Supply to application using iccDEV library

Execution

Trigger CIccTagCurve constructor parsing

Impact

Undefined behavior causes denial of service