CVE-2021-34423 is a critical buffer overflow vulnerability affecting numerous Zoom client and server products across various platforms (Android, iOS, Linux, macOS, Windows, Chrome OS) before specific patched versions. This flaw allows an unauthenticated attacker to remotely crash the service or application, and potentially execute arbitrary code. With a CVSS score of 9.8 (CRITICAL), the vulnerability is easily exploitable over the network with no user interaction required, leading to high impacts on confidentiality, integrity, and availability. While there is no evidence of active exploitation (KEV: No) and no public exploit code (Metasploit, Nuclei, ExploitDB: None), the vulnerability has garnered significant community discussion (11 mentions) and media coverage (1 article), indicating its perceived importance.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5.8.3CPE matchmatch criteria | cpe:2.3:a:zoom:meetings:*:*:*:*:*:*:*:* | ||
< 5.8.4CPE matchmatch criteria | cpe:2.3:a:zoom:meetings:*:*:*:*:*:*:*:* | ||
< 5.8.1CPE matchmatch criteria | cpe:2.3:a:zoom:meetings_for_blackberry:*:*:*:*:*:*:*:* | ||
< 5.8.4CPE matchmatch criteria | cpe:2.3:a:zoom:meetings_for_intune:*:*:*:*:*:*:*:* | ||
< 5.0.1CPE matchmatch criteria | cpe:2.3:a:zoom:meetings_for_chrome_os:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.