CVE-2026-81575 PUBLISHED

Missing Sanity Checks for Buffer Lengths

Assigner: wibu
Reserved: 27.08.2026 Published: 27.08.2026 Updated: 27.08.2026

If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 accepts requests with opcode 0x5e, which contain the data length and the data itself. Missing bounds checking on the data length value can lead to out of bounds reads, causing a segmentation fault that ultimately crashes the CodeMeter Runtime.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

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

CVSS 3.1

Product Status

Vendor	wibu-systems-ag
Product	codemeter-runtime
Versions	Default: unaffected affected from 9.00 to 9.10 (excl.) affected from 8.00 to 8.41a (excl.) Version 7.00 is unaffected Version 6.00 is unaffected

Credits

Andrew Teylu of Vector Informatik GmbH reporter

References

https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103401.pdf

Problem Types

CWE-130 Improper handling of length parameter inconsistency CWE