Security readout for executives and security teams
Plain-English summary
CVE-2026-21683 is a high-severity flaw in iccDEV before 2.3.1.2. Systems using the library to process ICC color profiles may be at risk if a user opens or processes a malicious profile. The vendor reports a patch in 2.3.1.2 and no known workarounds.
Executive priority
Prioritize remediation for products or workflows that process externally supplied color profiles. The vulnerability has high potential impact, but the available sources do not show active exploitation. Patch planning should be prompt, especially for internet-facing or user-submitted content paths.
Technical view
The issue is a type confusion vulnerability in icStatusCMM::CIccEvalCompare::EvaluateProfile(). The CVSS 3.1 score is 8.8 with network attack vector, low complexity, no privileges, and required user interaction. Impact is rated high for confidentiality, integrity, and availability. Affected versions are iccDEV below 2.3.1.2.
Likely exposure
Exposure is most likely where iccDEV is embedded in applications, pipelines, or services that accept or process ICC color profiles from users, partners, or untrusted sources. The CVSS vector requires user interaction, so risk depends on how profiles enter the workflow.
Exploitation context
The provided sources do not state known active exploitation, and this CVE is not marked KEV in the supplied data. The advisory indicates exploitation depends on processing a crafted ICC profile. Public issue and pull request references exist, but source evidence does not establish in-the-wild attacks.
Researcher notes
Key unknowns include downstream products bundling iccDEV and practical exploitability in specific integrations. Validate exposure through dependency analysis and profile-processing paths. Avoid assuming impact in software that does not use vulnerable iccDEV code or does not process ICC profiles.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.2 or later.
- Inventory applications and services that bundle or link iccDEV.
- Limit processing of ICC profiles from untrusted sources where feasible.
- Check vendor guidance for any additional operational mitigations.
Validation and detection
- Confirm deployed iccDEV versions are 2.3.1.2 or later.
- Review software bills of materials for embedded iccDEV usage.
- Identify workflows that ingest ICC profiles from external parties.
- Track remediation status for applications using vulnerable iccDEV versions.
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
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ATT&CK lookup starting points
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-21683 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-f2wp-j3fr-938wCVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/issues/183CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/pull/228CVE 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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.