CVE-2026-21504

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 92% 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
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: Elevated riskExposed: 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 heap buffer overflow in the ToneMap parser. This issue has been patched in version 2.3.1.2.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: 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%
Exploitation40% × 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 (6)

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

Heap Buffer Overflow in iccDEV ToneMap Parser · Advisory · InternationalColorConsortium/iccDEV · GitHub

https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-rqp9-r53c-3m9h
github_pr Patch Available

Fix: HBO in CIccMpeToneMap::Read()

Patch available: InternationalColorConsortium/iccDEV v2.3.2.2 (PR #415 merged 2026-01-02)

https://github.com/InternationalColorConsortium/iccDEV/pull/415
generic

heap-buffer-overflow in CIccMpeToneMap::Read() at IccProfLib/IccMpeBasic.cpp:4557:43 · Issue #366 · InternationalColorConsortium/iccDEV · GitHub

https://github.com/InternationalColorConsortium/iccDEV/issues/366
github_commit Patch Available

commit 23a38f83f2a5 (InternationalColorConsortium/iccDEV)

Patch available: InternationalColorConsortium/iccDEV v2.3.2.2 (contains commit 23a38f83f2a5)

https://github.com/InternationalColorConsortium/iccDEV/commit/23a38f83f2a5874a1c4427df59ec342af3277cad
github_commit

commit 14fe3785e6b1 (InternationalColorConsortium/iccDEV)

Fix landed in InternationalColorConsortium/iccDEV commit 14fe3785e6b1 — awaiting tagged release

https://github.com/InternationalColorConsortium/iccDEV/commit/14fe3785e6b1f9992375b2a24617a0d7f6a70f95
generic

iccDEV/IccProfLib/IccMpeBasic.cpp at 798be59011649a26a529600cc3cd56437634d3d0 · InternationalColorConsortium/iccDEV · GitHub

https://github.com/InternationalColorConsortium/iccDEV/blob/798be59011649a26a529600cc3cd56437634d3d0/IccProfLib/IccMpeBasic.cpp#L4557

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 23× 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 143 total refreshes for this CVE.

  1. 2026-09-19 06:30 UTCOSV refresh
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Frequently asked(5)

What is CVE-2026-21504?
CVE-2026-21504 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 heap buffer overflow in the ToneMap parser. This issue has been patched in version 2.3.1.2.
When was CVE-2026-21504 disclosed?
CVE-2026-21504 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-2026-21504 actively exploited?
CVE-2026-21504 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 88.0% of all scored CVEs.
What is the CVSS score of CVE-2026-21504?
CVE-2026-21504 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-21504?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21504, 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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