CVE-2026-21690Public exploitNetwork attack vector

Undefined behavior via out-of-range enum load

Published Jan 7, 2026 · Updated Jan 7, 2026

Type confusion in iccDEV before 2.3.1.2 allows attackers to trigger undefined behavior when a crafted ICC color profile is converted to XML. CIccTagXmlTagData::ToXml() loads an out-of-range icDataBlockType value and compares the complete value with a flag instead of testing its binary bit. The demonstrated path requires user-triggered processing of an attacker-supplied profile; no stronger consequence than undefined behavior is publicly demonstrated.

CVSS severity6.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in iccDEV before 2.3.1.2 allows attackers to trigger undefined behavior when a crafted ICC color profile is converted to XML. CIccTagXmlTagData::ToXml() loads an out-of-range icDataBlockType value and compares the complete value with a flag instead of testing its binary bit. The demonstrated path requires user-triggered processing of an attacker-supplied profile; no stronger consequence than undefined behavior is publicly demonstrated.

The record

CVE
CVE-2026-21690
Published
Jan 7, 2026
Updated
Jan 7, 2026
Vendor
International Color Consortium
Product
iccDEV
Classifications
CWE-475, CWE-20, CWE-843, CWE-457, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.3.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

International Color Consortium · iccDEVversion=< 2.3.1.2

Published CVSS scores

6.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-475Undefined Behavior for Input to API
CWE-20Improper Input Validation
CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
CWE-457Use of Uninitialized Variable
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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