Is CVE-2026-21504 in the CISA KEV catalog?

No. CVE-2026-21504 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-21504?

CVE-2026-21504 has a CVSS v3 base score of 6.6 (MEDIUM).

What is the EPSS score for CVE-2026-21504?

CVE-2026-21504 has an EPSS score of 0.18% (8th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-21504?

Upgrade iccdev to 2.3.1.2 or later.

CVE & CISA-KEV Catalog

CVE-2026-21504

MEDIUM

6.6

CVSS v3

NVD

Description

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 is vulnerable to heap buffer overflow in the ToneMap parser. This issue has been patched in version 2.3.1.2.

CWE-122Heap-based Buffer Overflow CWE-193 CWE-787Out-of-bounds Write

How to fix

Remediation Available

iccdevNVD

Affected:< 2.3.1.2Fixed in:2.3.1.2CVE-2026-21504derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityHigh

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

Exploit Intelligence

0.18%probability of exploitation in 30 days

8thpercentile

Low risk: more likely to be exploited than 8% of all known CVEs.

References

Patch2

Exploit1

github.com

Third-Party Advisory1

github.com

Issue Tracking1

github.com

Product1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-09.