CVE-2021-4467

HIGH EPSS 32.1%
Published Nov 14, 20257mo ago · Modified Jun 17, 20262w ago
8.7 CVSS 4.0
High
Find Similar
Published Nov 14, 2025 7mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
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/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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
32.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-400 Uncontrolled Resource Consumption Resource Mgmt

References 4

  • cxsecurity.com https://cxsecurity.com/issue/WLB-2021090114
  • vulners.com https://vulners.com/zdt/1337DAY-ID-36775
  • ptsecurity.com https://www.ptsecurity.com/
  • vulncheck.com https://www.vulncheck.com/advisories/positive-technologies-maxpatrol-8-and-xspider-remote-dos

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.