What is the CVSS score of CVE-2026-21503?

CVE-2026-21503 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H. EPSS exploitation probability: 0.0%.

Which versions of Iccdev are affected by CVE-2026-21503?

CVE-2026-21503 presents moderate security risk, a input validation vulnerability rated CVSS 6.1. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2026-21503?

Yes, a public proof-of-concept exploit is available for CVE-2026-21503. Prioritise patching immediately. EPSS: 0.0%.

Iccdev CVE-2026-21503

MEDIUM

Improper Input Validation (CWE-20)

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

Null Pointer Dereference Iccdev

6.1

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.1 MEDIUM

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

Attack Vector

Local

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 09, 2026 - 21:34 vuln.today

Public exploit code

Patch released

Jan 09, 2026 - 21:34 nvd

Patch available

CVE Published

Jan 07, 2026 - 18:15 nvd

MEDIUM 6.1

DescriptionGitHub Advisory

iccDEV provides a set of libraries and tools that allow for the interaction, manipulation, and application of ICC color management profiles. Prior to version 2.3.1.2, iccDEV has undefined behavior due to a null pointer passed to memcpy() in CIccTagSparseMatrixArray. This issue has been patched in version 2.3.1.2.

AnalysisAI

iccDEV versions before 2.3.1.2 are vulnerable to a null pointer dereference in the CIccTagSparseMatrixArray function when processing ICC color profiles, allowing local attackers with user interaction to cause denial of service or data corruption. Public exploit code exists for this vulnerability. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 6.1 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to compromise the affected system.
Remediation	A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-21503 vulnerability details – vuln.today

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