All vulnerabilities
CVE-2023-27992

Zyxel Multiple NAS Devices Command Injection Vulnerability

Zyxel Multiple Network-Attached Storage (NAS) DevicesNetwork & edge
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationExploited in the wildAdded to KEV 23 Jun 2023CISA KEV
Exploit odds (EPSS)82.3%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline14 Jul 2023Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 19 Jun 2023, 11:42 UTCPublishedCVE List
  2. 23 Jun 2023Added to CISA KEVCISA KEV

Description

Multiple Zyxel network-attached storage (NAS) devices contain a pre-authentication command injection vulnerability that could allow an unauthenticated attacker to execute commands remotely via a crafted HTTP request.

Text from CVE List

Affected versions 3

  • NAS326 firmwareaffected: < V5.21(AAZF.14)C0CVE List
  • NAS540 firmwareaffected: < V5.21(AATB.11)C0CVE List
  • NAS542 firmwareaffected: < V5.21(ABAG.11)C0CVE List

References 3