Vulnerability · Published Oct 20, 2026 · Assigned by icscert
CVE-2026-101103HMS Networks PEAK-System PCAN Windows drivers Classic Buffer Overflow
Medium 5.5
In plain English
A medium-severity buffer overflow in PCAN Windows CAN device drivers from HMS Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 98.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| HMS Networks | PEAK-System Device Driver Setup | 0 – through 5.1.2.1151 |
| HMS Networks | PCAN Windows CAN device drivers | 0 – through 5.1.2 |
Weakness: CWE-120 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H