CVE-2026-21684Public exploitNetwork attack vector

Service interrupt via faulty spectral-state copy

Published Jan 7, 2026 · Updated Jan 7, 2026

Undefined behavior in iccDEV before 2.3.1.2 allows remote attackers to cause a service interrupt through a crafted ICC profile. The CIccTagSpectralViewingConditions copy constructor incorrectly copies spectral-viewing state, propagating NaN values into an integer conversion in IccProfLib/IccUtil.cpp. Exploitation requires a user or application to process attacker-supplied profile data; the published reproduction reaches the flaw through iccRoundTrip.

CVSS severity7.1
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Undefined behavior in iccDEV before 2.3.1.2 allows remote attackers to cause a service interrupt through a crafted ICC profile. The CIccTagSpectralViewingConditions copy constructor incorrectly copies spectral-viewing state, propagating NaN values into an integer conversion in IccProfLib/IccUtil.cpp. Exploitation requires a user or application to process attacker-supplied profile data; the published reproduction reaches the flaw through iccRoundTrip.

The record

CVE
CVE-2026-21684
Published
Jan 7, 2026
Updated
Jan 7, 2026
Vendor
International Color Consortium
Product
iccDEV
Classifications
CWE-758, CWE-20, T1204.002
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

7.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

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-758Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
CWE-20Improper Input Validation
T1204.002User Execution: Malicious File

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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