CVE-2023-27992 is a critical pre-authentication command injection vulnerability affecting Zyxel NAS326, NAS540, and NAS542 devices running specific older firmware versions. This flaw allows an unauthenticated attacker to remotely execute operating system commands by sending a crafted HTTP request. With a CVSS score of 9.8 (Critical), it presents a severe risk due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. This vulnerability is actively exploited in the wild, as confirmed by its inclusion in CISA's KEV catalog, and has garnered significant community discussion and media coverage, despite no public exploit code being readily available on platforms like Metasploit or ExploitDB.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5.21\(aazf.14\)c0CPE matchmatch criteria | cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:* | ||
< 5.21\(aatb.11\)c0CPE matchmatch criteria | cpe:2.3:o:zyxel:nas540_firmware:*:*:*:*:*:*:*:* | ||
< 5.21\(abag.11\)c0CPE matchmatch criteria | cpe:2.3:o:zyxel:nas542_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.