Security readout for executives and security teams
Plain-English summary
CVE-2026-21500 affects iccDEV before 2.3.1.2. A specially crafted local input that reaches XML calculator macro expansion can trigger a stack overflow and crash the affected process. The main business impact is availability disruption in workflows using iccDEV libraries or tools for ICC color profile handling.
Executive priority
Prioritize remediation where iccDEV is used in automated or business-critical media, print, imaging, or color-management workflows. The issue is not currently evidenced as actively exploited, but crashes in processing pipelines can disrupt operations.
Technical view
The vulnerability is a stack overflow in iccDEV XML calculator macro expansion, affecting versions earlier than 2.3.1.2. The CVSS 3.1 vector is AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H, indicating local attack path, required user interaction, no confidentiality or integrity impact, and high availability impact.
Likely exposure
Exposure is most likely where iccDEV command-line tools or embedded libraries process ICC-related XML inputs from users, partners, build pipelines, or automated media/color workflows. Network exposure is not indicated by the provided CVSS vector.
Exploitation context
The source bundle does not show CISA KEV listing or public active exploitation. Exploitation requires local access and user interaction, likely by getting a vulnerable workflow to process malicious XML macro content. Impact is described as process crash or denial of service, not data theft or code execution.
Researcher notes
Evidence identifies a stack overflow during XML calculator macro expansion, mapped to input validation, resource consumption, and uncontrolled recursion-related CWEs. Public references include the GitHub advisory, issue, pull request, and fixing commits. The provided data does not support claims of remote exploitation or code execution.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.2 or later.
- Review vendor advisory GHSA-4h4j-mm9w-2cp4 for current guidance.
- Restrict processing of untrusted ICC/XML inputs until upgraded.
- Identify applications embedding vulnerable iccDEV libraries and rebuild them after updating dependencies.
Validation and detection
- Inventory installed iccDEV versions and flag anything below 2.3.1.2.
- Check software bills of materials for embedded iccDEV components.
- Confirm production tools no longer link against vulnerable iccDEV builds.
- Review input-processing workflows that accept ICC/XML content from external sources.
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-1119: Exact CWE lookup
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Open ATT&CK lookupCWE-20: Exact CWE lookup
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Open ATT&CK lookupCWE-400: 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-674: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-21500 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
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-4h4j-mm9w-2cp4CVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/issues/384CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/pull/406CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/commit/cce5f9b68a6c067b7ef898ccd5b000770745fb14CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/commit/f295826a6f15add90490030f23b2ddd8593bff5bCVE 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.