Security readout for executives and security teams
Plain-English summary
CVE-2026-21687 affects iccDEV, a library used to process ICC color profiles. A malformed profile can trigger undefined behavior in affected versions before 2.3.1.2. The main business risk is application disruption or degraded integrity where systems accept or process ICC profiles. A patched version is available.
Executive priority
Prioritize remediation for internet-facing, customer-facing, or automated media-processing systems that handle ICC profiles. The availability impact is high, but confirmed active exploitation is not reported in the provided sources. Upgrade planning should be prompt, with highest attention to systems processing untrusted files.
Technical view
iccDEV versions before 2.3.1.2 contain undefined behavior in CIccTagCurve::CIccTagCurve(). The CVSS 3.1 score is 7.1 with network attack vector, low complexity, no privileges, user interaction required, low integrity impact, and high availability impact. The advisory maps this to CWE-20 and CWE-758.
Likely exposure
Exposure is likely where products, services, or internal tools use iccDEV before 2.3.1.2 and process ICC color profiles, especially profiles supplied by users, partners, uploads, or content pipelines. Systems not using iccDEV, or already on 2.3.1.2 or later, are not indicated as affected by the provided sources.
Exploitation context
The sources do not report active exploitation, and this CVE is not listed as KEV in the provided data. Exploitation appears to require processing a crafted ICC profile by software using the vulnerable library. Public sources provided do not include exploit details, weaponization evidence, or a workaround.
Researcher notes
Key evidence comes from the GitHub security advisory, CVE record, issue, and pull request. The patch is version 2.3.1.2. No known workarounds are available per the CVE description. The provided sources do not establish active exploitation or provide detailed crash conditions beyond the vulnerable constructor.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.2 or later.
- Identify applications and dependencies that embed or link iccDEV.
- Prioritize systems processing externally supplied ICC profiles.
- If immediate upgrade is impossible, check vendor guidance for supported risk reduction.
- Do not treat input filtering as a vendor-confirmed workaround.
Validation and detection
- Confirm installed or bundled iccDEV versions across affected applications.
- Review SBOMs and build manifests for iccDEV dependencies.
- Verify upgraded components report version 2.3.1.2 or later.
- Confirm profile-processing workflows still function after update.
- Monitor vendor advisory and issue tracker for further clarification.
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-758: 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-2026-21687 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
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H2.84.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-prmm-g479-4fv7CVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/issues/180CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/pull/221CVE 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.