CVE-2026-21500

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 91% 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
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 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 that allow for the interaction, manipulation, and application of ICC color management profiles. Prior to version 2.3.1.2, iccDEV is vulnerable to stack overflow in the XML calculator macro expansion. This issue has been patched in version 2.3.1.2.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

January 7, 2026

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Aug 6, 2026
Patch available. Sources: github_commit, github_pr, github.
github Patch Available

Stack Overflow in iccDEV XML Calculator Macro Expansion · Advisory · InternationalColorConsortium/iccDEV · GitHub

https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-4h4j-mm9w-2cp4
github_pr Patch Available

Fix: Stack Overflow in CIccMpeXmlCalculator::Flatten() at IccXML/IccLibXML/IccMpeXml.cpp

Patch available: InternationalColorConsortium/iccDEV v2.3.2.2 (PR #406 merged 2026-01-02)

https://github.com/InternationalColorConsortium/iccDEV/pull/406
generic

stack-overflow in CIccMpeXmlCalculator::Flatten() at IccXML/IccLibXML/IccMpeXml.cpp:2675 · Issue #384 · InternationalColorConsortium/iccDEV · GitHub

https://github.com/InternationalColorConsortium/iccDEV/issues/384
github_commit

commit f295826a6f15 (InternationalColorConsortium/iccDEV)

Fix landed in InternationalColorConsortium/iccDEV commit f295826a6f15 — awaiting tagged release

https://github.com/InternationalColorConsortium/iccDEV/commit/f295826a6f15add90490030f23b2ddd8593bff5b
github_commit Patch Available

commit cce5f9b68a6c (InternationalColorConsortium/iccDEV)

Patch available: InternationalColorConsortium/iccDEV v2.3.2.2 (contains commit cce5f9b68a6c)

https://github.com/InternationalColorConsortium/iccDEV/commit/cce5f9b68a6c067b7ef898ccd5b000770745fb14

Weakness Classification(5)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 25× 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.

Showing the most recent 100 of 144 total refreshes for this CVE.

  1. 2026-09-19 06:30 UTCOSV refresh
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-16 14:07 UTCEPSS rescore
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  1. 2026-08-19 17:03 UTCEPSS rescore
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  6. 2026-08-14 15:44 UTCEG score recompute
  7. 2026-08-13 22:00 UTCEPSS rescore
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  9. 2026-08-11 13:42 UTCEPSS rescore
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  11. 2026-08-09 21:21 UTCEG score recompute
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  15. 2026-08-06 06:13 UTCEG score recompute▲ 2.30
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  31. 2026-07-23 10:49 UTCOSV refresh
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  61. 2026-07-06 06:02 UTCOSV refresh
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  65. 2026-07-01 15:06 UTCEPSS rescore
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  67. 2026-06-30 23:22 UTCEPSS rescore
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  73. 2026-06-25 13:49 UTCEPSS rescore
  74. 2026-06-24 14:05 UTCEPSS rescore
  75. 2026-06-23 21:32 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-21500?
CVE-2026-21500 is a high vulnerability published on January 7, 2026. 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 stack overflow in the XML calculator macro expansion. This issue has been patched in version 2.3.1.2.
When was CVE-2026-21500 disclosed?
CVE-2026-21500 was first published in the National Vulnerability Database on January 7, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21500 actively exploited?
CVE-2026-21500 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 87.7% of all scored CVEs.
What is the CVSS score of CVE-2026-21500?
CVE-2026-21500 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-21500?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21500, 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.

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