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CVE-2026-21691· NVD / CVE Program· CNA GitHub_M

iccDEV has Type Confusion in CIccTag:IsTypeCompressed()

iccDEV provides a set of libraries and tools that allow for the interaction, manipulation, and application of International Color Consortium (ICC) color management profiles. Versions prior to 2.3.1.2 have a Type Confusion vulnerability in `CIccTag:IsTypeCompressed()`. This vulnerability affects users of the iccDEV library who process ICC color profiles. Version 2.3.1.2 contains a patch. No known workarounds are available.

MediumCVSS 6.5 · v3.1—No exploit No fix recorded
Published
Jan 7, 2026
Updated
Jun 17, 2026
EPSS
0.3% · 19th percentile
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Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
6.5
CNA · GitHub_M
5.4
1.1 point gap

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
coloriccdev

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • color iccdevbefore 2.3.1.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • InternationalColorConsortium iccDEV

    • < 2.3.1.2affected

Same product

color: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-21679iccDEV has heap-buffer-overflow vulnerability in CIccLocalizedUnicode::GetText()
    39Monitor
  • CVE-2026-21675iccDEV has a Use After Free vulnerability in CIccCmm class via improper hint manager object deletion
    39Monitor
  • CVE-2026-24412iccDEV has Heap Buffer Overflow in icCurvesFromXml()
    35Monitor
  • CVE-2026-24411iccDEV has Undefined Behavior and Null Pointer Deference in CIccTagXmlSegmentedCurve::ToXml()
    35Monitor
  • CVE-2026-24410iccDEV has Undefined Behavior and Null Pointer Deference in CIccProfileXml::ParseBasic()
    35Monitor
  • CVE-2026-24409iccDEV has Undefined Behavior and Null Pointer Deference in CIccTagXmlFloatNum<>::ParseXml()
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-216790 days aparticcDEV has heap-buffer-overflow vulnerability in CIccLocalizedUnicode::GetText()
    39Monitor
  • CVE-2026-216752 days aparticcDEV has a Use After Free vulnerability in CIccCmm class via improper hint manager object deletion
    39Monitor
  • CVE-2026-216820 days aparticcDEV has heap-buffer-overflow in CIccXmlArrayType::ParseText()
    35Monitor
  • CVE-2026-216830 days aparticcDEV has Type Confusion in icStatusCMM::CIccEvalCompare::EvaluateProfile()
    35Monitor
  • CVE-2026-216880 days aparticcDEV has Type Confusion in SIccCalcOp::ArgsPushed() at IccProfLib/IccMpeCalc.cpp
    35Monitor
  • CVE-2026-216920 days aparticcDEV has Type Confusion in ToXmlCurve() at IccXML/IccLibXML/IccMpeXml.cpp
    35Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records