Critical9.2
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

PT-2025-87: Incorrect session expiration in Fastwel PLC web server

Error type:

Vulnerability vector:

  • Base vulnerability score (CVSSv4.0): CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  • Severity (CVSSv4.0): 9.2 (Critical)

Description:

The vulnerability was identified in Fastwel programmable controllers, versions 3.4.5.0 (CPM810-03), 3.4.9.1 (СPM723-01).

The discovered vulnerability can be exploited by an attacker to gain unlimited access to a device by brute-forcing or compromising a session token.

Vulnerability status: Confirmed by vendor

Date of vulnerability remediation: 10.09.2025

Recommendations:

Update to versions:

  • CPM723-01 3.4.9.5
  • CPM810-03 3.4.5.1

Additional information: 

Researcher: Maksim Gruzin (Positive Technologies)

Identifiers:

BDU:2025-11170

Vendor:

Fastwel

Vulnerable product:

CPM810-03, СPM723-01

Vulnerable versions:

3.4.5.0 (CPM810-03), 3.4.9.1 (СPM723-01)