Security readout for executives and security teams
Plain-English summary
CVE-2026-21507 is a denial-of-service flaw in iccDEV, a library/toolset for ICC color profile handling. Affected versions can enter an infinite loop while calculating a profile ID, consuming availability. The issue is fixed in version 2.3.1.1.
Executive priority
Treat as a high-priority availability risk for systems that process ICC profiles. Patch exposed or business-critical processing services first. Lower priority may be reasonable where iccDEV is unused, internal-only, or not reachable with untrusted profile input.
Technical view
The vulnerability is CWE-835: loop with unreachable exit condition in IccProfile.cpp CalcProfileID(). Published CVSS is 7.5 High, with network attack vector, low complexity, no privileges, no user interaction, and availability impact only. Affected versions are listed as below 2.3.1.1, including 2.3.1 and earlier.
Likely exposure
Exposure is most relevant where iccDEV is embedded in applications or services that process ICC color profiles, especially profiles supplied through external or network-facing workflows. Organizations should inventory direct and bundled use of iccDEV.
Exploitation context
The provided sources do not indicate active exploitation, and the CVE is not marked KEV. The source data rates exploitation prerequisites as low, but it does not provide public exploit evidence.
Researcher notes
The record is consistent on impact: availability-only denial of service from an infinite loop in CalcProfileID(). Sources name a fix release and upstream commit. No source in the bundle establishes exploitation in the wild or broader product impact beyond iccDEV.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.1 or later.
- Identify applications and services that bundle or link iccDEV.
- Prioritize systems processing externally supplied ICC profiles.
- Check the GitHub advisory for any updated vendor guidance.
Validation and detection
- Confirm deployed iccDEV versions are not below 2.3.1.1.
- Review dependency manifests, build artifacts, and vendor components for iccDEV.
- Verify remediation includes the referenced upstream fix commit.
- Document any internet-facing profile-processing workflows using iccDEV.
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
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CWE-835: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-21507 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-hgp5-r8m9-8qpjCVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/issues/244CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/commit/3f3ce789d0d2b608c194ed172fa38943519dc198CVE 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.
Loop with Unreachable Exit Condition ('Infinite Loop')
Loop with Unreachable Exit Condition ('Infinite Loop') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.