IBM Informix Wire Listener Vulnerable to Unauthenticated Remote Code Execution (CVE-2026-13476) | HOL Guard CVE

High · CVSS 7.3CVE-2026-13476

IBM Informix Wire Listener Vulnerable to Unauthenticated Remote Code Execution

Answer in brief

CVE-2026-13476 records a High severity (CVSS 7.3) vulnerability in IBM Informix Wire Listener Vulnerable to Unauthenticated Remote Code Execution. The current sources do not mark it as known exploited. The current feed maps IBM/Informix Dynamic Server (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 12, 2026Updated Aug 18, 2026Source checked Sep 28, 2026First seen by HOL Aug 12, 2026Material review Aug 18, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.3
Exploitation: Not marked as known exploited
Affected software: 12 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps IBM/Informix Dynamic Server (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:ibm:informix_dynamic_server::::::::	Not reported	Not reported
cpe:2.3:a:ibm:informix_dynamic_server:12.10:::::::*	Not reported	Not reported
cpe:2.3:a:ibm:informix_dynamic_server:14.10:::::::*	Not reported	Not reported
cpe:2.3:o:canonical:ubuntu_linux:-:::::::*	Not reported	Not reported
cpe:2.3:o:hp:hp-ux:-:::::::*	Not reported	Not reported
cpe:2.3:o:ibm:aix:-:::::::*	Not reported	Not reported
cpe:2.3:o:ibm:linux_on_ibm_z:-:::::::*	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:-:::::::*	Not reported	Not reported
cpe:2.3:o:novell:suse_linux:-:::::::*	Not reported	Not reported
cpe:2.3:o:oracle:solaris:-:::::::*	Not reported	Not reported
cpe:2.3:o:redhat:desktop:-:::::::*	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
IBM/Informix Dynamic Servergeneric	14.10 \|\| 15.0 \|\| 12.10	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for IBM/Informix Dynamic Server.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 18, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 12, 2026

Sources and claim methodology

Source referenceibm.com

Upstream source description

IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary commands with service account privileges on the system due to improper validation of user supplied input.

Quoted source text, attributed separately from HOL analysis.