Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-81574

Severity CVSS v4.0:
Pending analysis
Type:
CWE-134 Format String Vulnerability
Publication date:
27/08/2026
Last modified:
27/08/2026

Description

In CodeMeter Runtime before versions 8.41a and 9.10, the logger does not sanitize input strings in certain cases, allowing an attacker to inject printf-style format<br /> specifiers. This can be used to reliably crash CodeMeter and disclose sensitive information such as process memory<br /> and stack canaries. The attack works locally, for example by using cmu --set-proxy to set the proxy value, and<br /> remotely when combined with CVE-2026-81573 by setting General.ProxyServer and then triggering this<br /> vulnerability.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.20 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): None
Availability (A): High

Base Score 3.x
8.20
Severity 3.x
HIGH

References to Advisories, Solutions, and Tools