VULNERABILITY INTELLIGENCE

CVE-2021-36798

CVSS score7.5 HIGH

EPSS probability4.29%

CISA KEVNot currently listed

Published2021-08-09

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

A Denial-of-Service (DoS) vulnerability was discovered in Team Server in HelpSystems Cobalt Strike 4.2 and 4.3. It allows remote attackers to crash the C2 server thread and block beacons' communication with it.

Weakness classification

nvd@nist.gov: CWE-770

Primary references

cve@mitre.org — Exploit, Third Party Advisory
cve@mitre.org — Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory