CVE-2021-36798 is a Denial-of-Service (DoS) vulnerability affecting HelpSystems Cobalt Strike Team Server versions 4.2 and 4.3. This flaw allows remote attackers to crash the C2 server thread, disrupting beacon communication. With a CVSS score of 7.5 (HIGH), it is easily exploitable over the network with no user interaction, leading to a complete loss of availability for the C2 server. While no public exploit code or active exploitation has been confirmed, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
4.2CPE matchmatch criteria | cpe:2.3:a:helpsystems:cobalt_strike:4.2:*:*:*:*:*:*:* | ||
4.3CPE matchmatch criteria | cpe:2.3:a:helpsystems:cobalt_strike:4.3:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.