PatchTheCVECVE-2026-109576: The parser in PEAK-System PCAN driver correctly detected the malformed record, but the loop iterating the reco
CVE-2026-109576 is a medium-severity flaw (CVSS 5.5) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The parser in PEAK-System PCAN driver correctly detected the malformed record, but the loop iterating the record list advanced its processed-bytes counter even when a record had been rejected as invalid.
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.5 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.1% (top 98%) |
| CISA exploited list | No |
| Weakness | CWE-787 |
| Published | 2026-10-20 |
| Last modified | 2026-10-22 |
Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
Advisories and coverage
Official advisories
- CISA Alerts and Advisories: HMS Networks PEAK-System PCAN Windows drivers 2026-10-20
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-109576?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-109576 being exploited?
CVE-2026-109576 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-109576 affect?
CVE-2026-109576 affects affected software. Severity is medium (CVSS 5.5). The parser in PEAK-System PCAN driver correctly detected the malformed record, but the loop iterating the record list advanced its processed-bytes counter even when a record had been rejected as invalid.
How urgent is CVE-2026-109576?
Priority 20/100. No elevated risk signals yet.