Security readout for executives and security teams
Plain-English summary
CVE-2026-21494 affects iccDEV, a library/toolset for working with ICC color profiles. When vulnerable versions process certain ICC profiles, a heap buffer overflow can occur. The published impact is mainly service disruption, with some confidentiality impact. A patched version, 2.3.1.2, is available.
Executive priority
Prioritize remediation for environments that process external ICC profiles or support media, print, imaging, and document workflows. This is not currently an internet-scale emergency, but it should be patched in normal vulnerability management cycles because denial-of-service impact is rated high.
Technical view
Versions of InternationalColorConsortium iccDEV before 2.3.1.2 contain a heap buffer overflow in CIccTagLut8::Validate(). The CVSS 3.1 score is 6.1 with local attack vector and required user interaction. Listed weaknesses include CWE-122, CWE-125, and CWE-193. The advisory states there are no known workarounds.
Likely exposure
Exposure is likely limited to systems or applications that include iccDEV before 2.3.1.2 and process ICC color profiles. Risk is higher where profiles come from users, partners, documents, media workflows, or automated ingestion pipelines.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked in KEV. The CVSS vector indicates exploitation requires local access and user interaction. Public sources confirm a patch and related commits, but do not provide evidence of weaponized exploitation.
Researcher notes
Ground truth is the GitHub security advisory and CVE record. The sources identify the vulnerable function and fixed version, but do not describe affected downstream products. Avoid assuming exposure beyond direct or bundled iccDEV use.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.2 or later.
- Identify applications and services bundling or linking iccDEV.
- Limit processing of untrusted ICC profiles where feasible.
- Check ICC and project guidance for any updated remediation notes.
Validation and detection
- Confirm installed or bundled iccDEV versions are 2.3.1.2 or later.
- Review software bills of materials for iccDEV dependencies.
- Check image, print, color, and media workflows for ICC profile ingestion.
- Verify remediation against the vendor advisory and release changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-122: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-125: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-193: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-21494 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H1.84.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-hjxv-xr7w-84fcCVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/issues/398CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/commit/7c2cb719a9de1c00844e457e070d657314383ee3CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/commit/e91fe722ac54ce497d410153e7405090e0565d7bCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Off-by-one Error
Off-by-one Error represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.