CVE-2026-109576CWE-787

CVE-2026-109576

Medium · published October 21, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
1.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
6.8 · CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00122 · 1.9th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-10-21T01:17Z
References (4)
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-293-01.json · [email protected]https://www.cisa.gov/news-events/ics-advisories/icsa-26-293-01 · [email protected]https://www.hms-networks.com/cybersecurity · [email protected]https://www.peak-system.com/support/downloads/software/ · [email protected]
EPSS history
Timeline
  • 22 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 20 OCT 20:16Z
    HMS Networks PEAK-System PCAN Windows drivers Out-of-bounds Write
    cvelistv5
  • 20 OCT 20:16Z
    HMS Networks PEAK-System PCAN Windows drivers Out-of-bounds Write
    cvelistv5