Security readout for executives and security teams
Plain-English summary
CVE-2026-21504 is a memory corruption flaw in iccDEV’s ToneMap parser. An affected application could crash or have limited data impact when a user processes a crafted ICC color profile. The issue affects iccDEV versions before 2.3.1.2 and is patched in 2.3.1.2.
Executive priority
Treat as a moderate-priority patching item. Business risk is highest for graphics, imaging, print, or color-management workflows handling untrusted files. The main documented impact is service disruption, with limited confidentiality and integrity impact.
Technical view
The vulnerability is a heap buffer overflow in iccDEV before 2.3.1.2, mapped to CWE-122, CWE-193, and CWE-787. CVSS 3.1 is 6.6 with local attack vector, low complexity, no privileges, and required user interaction. Reported impacts are low confidentiality, low integrity, and high availability.
Likely exposure
Organizations are exposed if they build, package, or run software using iccDEV before 2.3.1.2, especially where users or workflows open or process ICC profiles from outside trusted sources.
Exploitation context
The CVSS vector indicates exploitation requires local access context and user interaction, such as processing a malicious profile. The source bundle does not indicate active exploitation, and the CVE is not marked as CISA KEV.
Researcher notes
Key areas are the ToneMap parser and related bounds handling in IccProfLib. Public references include the GitHub advisory, issue, pull request, and fixing commits. Do not assume remote network exploitability from the provided CVSS vector.
Mitigation direction
- Upgrade iccDEV to version 2.3.1.2 or later.
- Identify dependent applications that bundle or statically link iccDEV.
- Limit processing of untrusted ICC profiles until upgraded.
- Monitor the GitHub advisory for any updated vendor guidance.
Validation and detection
- Check installed or bundled iccDEV versions across endpoints, servers, and build environments.
- Review software bills of materials for InternationalColorConsortium iccDEV.
- Confirm patched code or release 2.3.1.2 is deployed.
- Prioritize systems that process externally supplied ICC profiles.
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-122: 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-193: 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-787: 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-2026-21504 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-rqp9-r53c-3m9hCVE reference · x_refsource_CONFIRM
- https://github.com/InternationalColorConsortium/iccDEV/issues/366CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/pull/415CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/commit/14fe3785e6b1f9992375b2a24617a0d7f6a70f95CVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/commit/23a38f83f2a5874a1c4427df59ec342af3277cadCVE reference · x_refsource_MISC
- https://github.com/InternationalColorConsortium/iccDEV/blob/798be59011649a26a529600cc3cd56437634d3d0/IccProfLib/IccMpeBasic.cpp#L4557CVE 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.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Off-by-one Error
Off-by-one Error represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.