AUGUST 4, 2026
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Case File

CVE-2023-27991

HIGH · CVSS 8.8 EPSS 1.51%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2023-04-24 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.8. It may be remotely exploitable. Exploitation may require the attacker to be authenticated.

CVE
CVE-2023-27991
Severity
HIGH
CVSS
8.8
EPSS
1.51%

Original NVD Description

The post-authentication command injection vulnerability in the CLI command of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow an authenticated attacker to execute some OS commands remotely.

Related CVEs

Other vulnerabilities affecting the same vendor(s)