CVE-2021-4467CWE-400

Positive Technologies MaxPatrol 8 & XSpider Remote DoS

High · published November 14, 2025

CVSS v4.0
8.7
EPSS
0%
Percentile
41.4
In the wild
Unconfirmed
What it is

Positive Technologies MaxPatrol 8 and XSpider contain a remote denial-of-service vulnerability in the client communication service on TCP port 2002. The service generates a new session identifier for each incoming connection without adequately limiting concurrent requests. An unauthenticated remote attacker can repeatedly issue HTTPS requests to the service, causing excessive allocation of session identifiers. Under load, session identifier collisions may occur, forcing active client sessions to disconnect and resulting in service disruption.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00493 · 41.4th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2025-11-14T22:51Z
EPSS history
Timeline
  • 14 NOV 22:51Z
    Positive Technologies MaxPatrol 8 & XSpider Remote DoS
    cvelistv5