Security readout for executives and security teams
Plain-English summary
CVE-2026-21688 affects iccDEV, a library used to process ICC color profiles. A malicious or malformed color profile could trigger type confusion when processed by software using vulnerable iccDEV versions. The issue is high severity because successful exploitation may affect confidentiality, integrity, and availability. Upgrade to version 2.3.1.2 or later.
Executive priority
Treat this as a high-priority dependency update for systems that process untrusted color profiles. Urgency is highest for externally facing ingestion workflows and content-processing environments. No active exploitation is cited in the provided sources.
Technical view
Versions of International Color Consortium iccDEV before 2.3.1.2 contain type confusion in SIccCalcOp::ArgsPushed() in IccProfLib/IccMpeCalc.cpp. The CVSS 3.1 score is 8.8 with network attack vector, low complexity, no privileges, and required user interaction. The advisory lists CWE-190, CWE-20, CWE-476, and CWE-681.
Likely exposure
Exposure is most likely where iccDEV is embedded in applications, services, or workflows that accept or process ICC color profiles from users, partners, documents, images, print pipelines, or other external sources.
Exploitation context
The CVSS vector indicates exploitation requires user interaction and no privileges. The provided sources do not state active exploitation, public exploit availability, or inclusion in CISA KEV.
Researcher notes
The patch is associated with iccDEV 2.3.1.2 and GitHub PR 422. Public details identify the vulnerable function and file but do not provide exploit confirmation. Validate reachability through ICC profile parsing paths in products that statically or dynamically link iccDEV.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.2 or later.
- Inventory applications and pipelines that process ICC color profiles using iccDEV.
- Limit processing of untrusted ICC profiles where feasible until upgraded.
- If upgrade timing is unclear, check vendor guidance and dependent application updates.
- Prioritize systems handling externally supplied images, documents, or profile files.
Validation and detection
- Confirm installed or bundled iccDEV versions are 2.3.1.2 or later.
- Review software bills of materials for iccDEV dependencies.
- Ask vendors whether their products embed vulnerable iccDEV versions.
- Verify update deployment across build, desktop, server, and processing environments.
- Monitor vendor advisory and related GitHub issue or pull request updates.
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
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-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-476: 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 lookupCVE-2026-21688 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-3r2x-j7v3-pg6fCVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/issues/379CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/pull/422CVE 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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
NULL Pointer Dereference
NULL Pointer Dereference 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.