How broadly exploitable is this vulnerability?

Exploitability depends on whether attackers can supply or influence ICC profiles or CLUT parameters processed by iccDEV. In applications that accept untrusted images, documents, or profiles and process them automatically, the issue can present a meaningful remote attack surface and may lead to memory corruption.

What level of access does an attacker need?

An attacker typically needs only the ability to provide crafted input that triggers CLUT initialization—for example, uploading a file with an embedded ICC profile or feeding profile data through an API. No direct code execution capability is required initially; the vulnerability exists in the processing of that data.

What is the safest general fix pattern for affected code?

The most robust fix pattern is to remove reliance on undefined behavior by tightening all input validation, making size and dimension checks explicit, and restructuring the implementation so that buffer sizes and indices are derived using checked arithmetic and invariant assertions. Ensuring that initialization routines fail safely when encountering invalid parameters is key.

Severity:

HIGH RISK

(8.8)

Undefined Behavior in CLUT Initialization (CWE-758) in iccDEV Color Management Library

CVE-2026-21677

Published:

Jan 5, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Undefined Behavior / Improper Input Handling

CWE:

CWE-20;CWE-758

Impact:

Memory Corruption and Application Compromise

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Undefined Behavior / Improper Input Handling

CWE:

CWE-20;CWE-758

Impact:

Memory Corruption and Application Compromise

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

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Undefined Behavior in CLUT Initialization (CWE-758) in iccDEV Color Management Library

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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