Security readout for executives and security teams
Plain-English summary
CVE-2026-21505 affects iccDEV before 2.3.1.2, a library/toolset for ICC color profile handling. A malformed or unexpected input can trigger undefined behavior from an invalid enum value. The documented impact is denial of service, not data theft or privilege gain. Business urgency is moderate where iccDEV processes user-supplied ICC profiles.
Executive priority
Treat as a moderate-priority availability risk. Prioritize patching where ICC profile processing is exposed to untrusted files or supports business-critical workflows. Lower urgency is reasonable for isolated tools with trusted-only inputs.
Technical view
The issue is classified as CWE-20 and CWE-843: improper input handling leading to type confusion/invalid enum undefined behavior. CVSS 3.1 is 5.5: local attack vector, low complexity, no privileges, user interaction required, unchanged scope, high availability impact only. The advisory states the issue is fixed in iccDEV 2.3.1.2.
Likely exposure
Exposure is most likely in applications, pipelines, or desktop tools that embed iccDEV versions earlier than 2.3.1.2 and open or process ICC color profiles, especially files from users, partners, or untrusted sources.
Exploitation context
Sources do not indicate active exploitation, and CISA KEV status is false in the provided data. Exploitation requires user interaction and local file processing context, based on the CVSS vector. Expected impact is application crash or denial of service, not confidentiality or integrity compromise.
Researcher notes
The public record points to invalid enum undefined behavior fixed by upstream commits and pull request 419. Available evidence does not establish remote, no-interaction exploitation or code execution. Review the advisory, issue 361, pull request, and fixing commits for precise code-level changes.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.2 or later.
- Inventory products and internal tools that bundle or link iccDEV.
- Limit processing of untrusted ICC profiles until upgraded.
- Monitor the GitHub advisory for any revised vendor guidance.
Validation and detection
- Check deployed iccDEV versions are 2.3.1.2 or later.
- Review build manifests, SBOMs, and dependency lockfiles for iccDEV.
- Confirm applications process ICC profiles only through patched builds.
- Track remediation against systems accepting user-supplied profile files.
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-20: 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-843: 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-2026-21505 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
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/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:N/I:N/A:H1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-j577-8285-qrf9CVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/issues/361CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/pull/419CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/commit/3bbe2088b2796cf0aa4f7fa19f7ccd9ad1c7aba5CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/commit/b1bb72fc3e9442ee1355aabae7314bb7d3fc9d41CVE 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.
Access of Resource Using Incompatible Type ('Type Confusion')
Access of Resource Using Incompatible Type ('Type Confusion') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.