Quick answers
- Is CVE-2026-81575 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-81575 being exploited in the wild.
- How severe is CVE-2026-81575?
- High severity, with a CVSS score of 7.5, published 27 August 2026.
- Which products and versions are affected?
- Wibu-Systems CodeMeter Runtime before 8.41a and 9.10.
- Is there a fix for CVE-2026-81575?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-81575 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-81575?
- Check whether you run Wibu-Systems CodeMeter Runtime at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability exists in CodeMeter Runtime's handling of opcode 0x5e network requests when the service is configured as a server. The vulnerable code accepts the data length value from the request without proper bounds checking, leading to out-of-bounds memory reads. An unauthenticated remote attacker can craft a malicious request with an oversized data length value to trigger a segmentation fault, causing the entire CodeMeter Runtime service to crash. This results in denial of service affecting all license-dependent applications on network clients. The issue has been patched in versions 8.41a and 9.10.
Affected products
- Wibu-Systems CodeMeter Runtime before 8.41a and 9.10
Timeline
- 2026-08-27: published