Security readout for executives and security teams
Plain-English summary
CVE-2026-21673 is a high-severity memory-safety issue in iccDEV, a library for handling ICC color profiles. A malicious color profile processed by affected software could cause serious impact, including confidentiality, integrity, and availability compromise. User interaction is required, and no active exploitation is reported in the provided sources.
Executive priority
Prioritize remediation for systems that process untrusted color profiles or expose file-import workflows. The issue is high severity, but urgency is moderated by required user interaction and no cited evidence of active exploitation.
Technical view
iccDEV versions before 2.3.1.1 contain integer overflow/underflow and type conversion issues in CIccXmlArrayType::ParseTextCountNum(). The CVSS 3.1 score is 7.8 with local attack vector and required user interaction. The issue affects users processing ICC color profiles with vulnerable iccDEV versions and is fixed in 2.3.1.1.
Likely exposure
Exposure is likely where iccDEV is embedded in applications, tools, or workflows that import or process ICC color profiles. Risk is higher for systems handling untrusted profiles from users, partners, downloads, or automated media/color-processing pipelines.
Exploitation context
The provided CVSS vector indicates local exploitation with low complexity, no privileges required, and user interaction required. The sources do not report active exploitation, public weaponization, or inclusion in CISA KEV.
Researcher notes
The public record identifies the vulnerable function and fix commit but provides limited operational detail. Avoid assuming affected downstream products without dependency evidence. Focus validation on version detection, ICC profile ingestion paths, and whether the patched commit or 2.3.1.1 release is present.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.1 or later.
- Identify downstream products or internal tools bundling vulnerable iccDEV versions.
- Restrict processing of untrusted ICC profiles until patched.
- Monitor the GitHub advisory and vendor channels for updated guidance.
Validation and detection
- Inventory systems and builds using iccDEV.
- Confirm iccDEV version is 2.3.1.1 or later.
- Review SBOMs and dependency manifests for embedded iccDEV.
- Check whether applications process user-supplied ICC color profiles.
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-190: Exact CWE lookup
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Open ATT&CK lookupCWE-681: Exact CWE lookup
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Open ATT&CK lookupCWE-704: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-21673 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
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/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:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/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-g66g-f82c-vgm6CVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/issues/243CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/commit/32740802ee14418bd14c429d7e2f142d92cd5c4fCVE 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.
Integer Overflow or Wraparound
Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Incorrect Conversion between Numeric Types
Incorrect Conversion between Numeric Types represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Incorrect Type Conversion or Cast
Incorrect Type Conversion or Cast represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.