What is CVE-2026-21503?

CVE-2026-21503 is a medium-severity vulnerability in Color Iccdev, classified under Improper Input Validation. CVSS score: 6.1/10. Published 2026-01-07.

How severe is CVE-2026-21503?

Medium severity. CVSS v3 base score is 6.1 out of 10.

NULL pointer dereference in Color Iccdev

CVE-2026-21503

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-01-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.

EPSS exploit prediction

EPSS: 0.002 (8.2th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Color Iccdev
Internationalcolorconsortium Iccdev — versions < 2.3.1.2

Weakness classification (CWE)

References

github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-h554-qr… (Third Party Advisory)
github.com/InternationalColorConsortium/iccDEV/issues/367 (Exploit, Issue Tracking)
github.com/InternationalColorConsortium/iccDEV/pull/417 (Issue Tracking)
github.com/InternationalColorConsortium/iccDEV/commit/55259a6395c4f6124b5d0e384… (Patch)

Frequently asked questions

What is CVE-2026-21503?: CVE-2026-21503 is a medium-severity vulnerability in Color Iccdev, classified under Improper Input Validation. CVSS score: 6.1/10. Published 2026-01-07.
How severe is CVE-2026-21503?: Medium severity. CVSS v3 base score is 6.1 out of 10.