Security readout for executives and security teams
Plain-English summary
CVE-2026-21493 affects iccDEV, a library/toolset for ICC color profile work. Versions 2.3.1.1 and earlier can mishandle data types during XML curve serialization, potentially causing crashes and limited data impact when a user processes crafted local content. The published fix is version 2.3.1.2.
Executive priority
Treat as a targeted reliability and supply-chain maintenance issue, not an internet-wide emergency. Prioritize updates where iccDEV handles files from customers, partners, or automated ingestion pipelines, because the strongest stated impact is service disruption.
Technical view
The issue is a type confusion in CIccSingleSampledeCurveXml during XML Curve Serialization. The CVSS 3.1 score is 6.6 with local attack vector, low complexity, no privileges, and required user interaction. Impact is rated low for confidentiality and integrity, high for availability. CWEs listed include CWE-843, CWE-703, and CWE-188.
Likely exposure
Exposure is most likely where iccDEV versions below 2.3.1.2 are installed or embedded in workflows that serialize or process ICC profile XML curve data. The CVSS vector indicates the attack is local and requires user interaction, limiting broad remote exposure.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked KEV. Exploitation would require a user to interact with crafted local content or a workflow that processes such content. Availability impact is the main concern based on the CVSS scoring.
Researcher notes
Evidence is limited to the CVE record, GitHub advisory, issue, and fixing commit. Public sources name the vulnerable class and fixed version but do not provide confirmed exploitation. Avoid assuming remote reachability unless a specific consuming application exposes iccDEV processing to untrusted input.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.2 or later.
- Identify applications or build pipelines that bundle iccDEV.
- Restrict handling of untrusted ICC XML/profile content until upgraded.
- Monitor the GitHub advisory for additional vendor guidance.
Validation and detection
- Inventory installed or bundled iccDEV versions.
- Confirm any version 2.3.1.1 or below is upgraded.
- Review dependency manifests and build artifacts for embedded iccDEV.
- Check workflows that process ICC XML curve data from users.
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-188: 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-703: 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-2026-21493 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
- 6.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/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:L/A:H1.84.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.6MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-p85g-f9q7-jmjxCVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/issues/358CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/commit/7ff76d1471077172f9659de8d9536443eac7c48fCVE 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.
Reliance on Data/Memory Layout
Reliance on Data/Memory Layout represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Check or Handling of Exceptional Conditions
Improper Check or Handling of 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.