Format String Vulnerability in Logger

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-81574
StatePUBLISHED
Assignerwibu
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-27 10:16:40 UTC
Updated2026-08-27 10:16:40 UTC
DescriptionIn 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 specifiers. This can be used to reliably crash CodeMeter and disclose sensitive information such as process memory and stack canaries. The attack works locally, for example by using cmu --set-proxy to set the proxy value, and remotely when combined with CVE-2026-81573 by setting General.ProxyServer and then triggering this vulnerability.

Risk And Classification

Primary CVSS: v3.1 8.2 HIGH from 2fc02b1f-71e7-4514-a878-169626f68903

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Problem Types: CWE-134 | CWE-134 CWE-134 Use of Externally-Controlled format string

VersionSourceTypeScoreSeverityVector
3.12fc02b1f-71e7-4514-a878-169626f68903Secondary8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
3.1CNACVSS8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wibu-systems-ag Codemeter-runtime affected 9.00 9.10 custom Not specified
CNA Wibu-systems-ag Codemeter-runtime affected 8.00 8.41a custom Not specified
CNA Wibu-systems-ag Codemeter-runtime affected 7.00 Not specified
CNA Wibu-systems-ag Codemeter-runtime unaffected 6.00 Not specified

References

ReferenceSourceLinkTags
cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103... 2fc02b1f-71e7-4514-a878-169626f68903 cdn.wibu.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Andrew Teylu of Vector Informatik GmbH (en)

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