CVE-2026-21677

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 59% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

iccDEV provides a set of libraries and tools for working with ICC color management profiles. Versions 2.3.1 and below have Undefined Behavior in its CIccCLUT::Init function which initializes and sets the size of a CLUT. This issue is fixed in version 2.3.1.1.

CVSS v3
8.8
EG Score
8.8(medium)
EPSS
22.8%
KEV
Not listed

Published

January 6, 2026

Last Modified

January 12, 2026

Advisory Details (3)

Auto-updated Jul 6, 2026
Patch available. Sources: github_commit, github.
generic

Known Defect | UB | runtime errors | IccProfLib/IccTagLut.cpp · Issue #181 · InternationalColorConsortium/iccDEV · GitHub

https://github.com/InternationalColorConsortium/iccDEV/issues/181
github Patch Available

Undefined Behavior in CIccCLUT::Init() · Advisory · InternationalColorConsortium/iccDEV · GitHub

https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-95w5-jvqf-3994
github_commit

commit 201125fbda22 (InternationalColorConsortium/iccDEV)

Fix landed in InternationalColorConsortium/iccDEV commit 201125fbda22 — awaiting tagged release

https://github.com/InternationalColorConsortium/iccDEV/commit/201125fbda22c8e4ea95800a6b427093fa4b8a22

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-16 17:03 UTCEPSS rescore
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  19. 2026-07-06 06:32 UTCOSV refresh
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  1. 2026-07-01 15:06 UTCEPSS rescore
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  19. 2026-06-17 18:05 UTCOSV refresh
  20. 2026-06-17 17:53 UTCEPSS rescore
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  22. 2026-06-15 17:48 UTCEPSS rescore
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  53. 2026-05-29 16:37 UTCEG score recompute
  54. 2026-05-29 13:44 UTCEPSS rescore
  55. 2026-05-29 13:44 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-21677?
CVE-2026-21677 is a high vulnerability published on January 6, 2026. iccDEV provides a set of libraries and tools for working with ICC color management profiles. Versions 2.3.1 and below have Undefined Behavior in its CIccCLUT::Init function which initializes and sets the size of a CLUT. This issue is fixed in version 2.3.1.1.
When was CVE-2026-21677 disclosed?
CVE-2026-21677 was first published in the National Vulnerability Database on January 6, 2026, with the most recent update on January 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21677 actively exploited?
CVE-2026-21677 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 22.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-21677?
CVE-2026-21677 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-21677?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21677, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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