CVE-2021-4467

N/A Unknown
Published: November 14, 2025 Modified: November 18, 2025

Description

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.

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References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://cxsecurity.com/issue/WLB-2021090114
Source: disclosure@vulncheck.com
https://vulners.com/zdt/1337DAY-ID-36775
Source: disclosure@vulncheck.com
https://www.ptsecurity.com/
Source: disclosure@vulncheck.com
https://cxsecurity.com/issue/WLB-2021090114
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://vulners.com/zdt/1337DAY-ID-36775
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

6 reference(s) from NVD

Quick Stats

CVSS v3 Score
N/A / 10.0
EPSS (Exploit Probability)
0.1%
35th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)