Security readout for executives and security teams
Plain-English summary
CVE-2026-21693 affects iccDEV, a library for handling ICC color profiles. If an affected application processes a crafted color profile, the flaw could impact confidentiality, integrity, and availability. The vendor advisory states versions before 2.3.1.2 are vulnerable and 2.3.1.2 contains the patch.
Executive priority
Prioritize remediation for systems that accept or process external image, print, design, or color-profile files. The issue is high severity, patched, and has no named workaround, making upgrade and dependency validation the practical response.
Technical view
The issue is a type confusion in CIccSegmentedCurveXml::ToXml() in IccXML/IccLibXML/IccMpeXml.cpp. The CVE lists CWE-843, CWE-20, CWE-681, and CWE-754. CVSS 3.1 is 8.8 with network attack vector, low complexity, no privileges required, and user interaction required.
Likely exposure
Exposure is likely where iccDEV versions before 2.3.1.2 are embedded in tools, services, or workflows that process ICC color profiles, especially profiles supplied by users, partners, files, or network content.
Exploitation context
The public sources do not report active exploitation, and the CVE is not listed as KEV in the provided bundle. Exploitation requires a victim system or application to process a malicious ICC profile; impact is rated high across confidentiality, integrity, and availability.
Researcher notes
Evidence is limited to the CVE record, GitHub advisory, issue, and pull request. Sources identify the vulnerable function and patched version, but do not provide confirmed exploit-in-the-wild status. Avoid assuming exposure unless iccDEV is present in the processing path.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.2 or later.
- Identify products and internal tools that statically or dynamically include iccDEV.
- Limit processing of untrusted ICC profiles until patched.
- Check the GitHub advisory and vendor repository for any updated guidance.
Validation and detection
- Inventory deployed iccDEV versions and confirm none are below 2.3.1.2.
- Review SBOMs and build manifests for bundled iccDEV copies.
- Confirm profile-processing applications were rebuilt or redeployed with the patched library.
- Track the referenced pull request and advisory for patch provenance.
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-681: 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-754: 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-2026-21693 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
- 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-v3q7-7hw6-6jq8CVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/issues/389CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/pull/432CVE 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.
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.
Improper Check for Unusual or Exceptional Conditions
Improper Check for Unusual or Exceptional Conditions 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.