HMS Networks PEAK-System PCAN Windows drivers Out-of-bounds Write
Summary
| CVE | CVE-2026-109576 |
|---|---|
| State | PUBLISHED |
| Assigner | icscert |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-20 21:17:15 UTC |
| Updated | 2026-10-20 21:17:15 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v4.0 6.8 MEDIUM from [email protected]
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-787 | CWE-787 CWE-787
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 6.8 | MEDIUM | 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/E:X/C... |
| 4.0 | CNA | CVSS | 6.8 | MEDIUM | 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 |
| 3.1 | [email protected] | Secondary | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
CVSS v4.0 Breakdown
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | HMS Networks | PEAK-System Device Driver Setup | affected 5.1.2.1151 custom | Not specified |
| CNA | HMS Networks | PEAK-System Device Driver Setup | unaffected 5.1.4 | Not specified |
| CNA | HMS Networks | PCAN Windows CAN Device Drivers | affected 5.1.2 custom | Not specified |
| CNA | HMS Networks | PCAN Windows CAN Device Drivers | unaffected 5.1.4 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.hms-networks.com/cybersecurity | [email protected] | www.hms-networks.com | |
| github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-29... | [email protected] | github.com | |
| www.peak-system.com/support/downloads/software | [email protected] | www.peak-system.com | |
| www.cisa.gov/news-events/ics-advisories/icsa-26-293-01 | [email protected] | www.cisa.gov | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Seyeon Bang reported these vulnerabilities to CISA. (en)
Additional Advisory Data
Solutions
CNA: HMS Networks AB has addressed the issue in version 5.1.4 and recommends that users upgrade to the newest available version. Users can find software updates for PEAK-System PCAN on the software download page https://www.peak-system.com/support/downloads/software/ . For more information see the associated HMS security advisory https://www.hms-networks.com/cybersecurity .