CVE-2023-27992

high-risk
Published 2023-06-19

The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior to V5.21(AATB.11)C0, and NAS542 firmware versions prior to V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands remotely by sending a crafted HTTP request.

Do I need to act?

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86.5% chance of exploitation in next 30 days
EPSS score — higher than 13% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (3)

Affected Vendors

Zyxel

References (3)

Patch https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advis...
Patch https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advis...
US Government Resource https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-...
68
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 27/34 · High
Exposure 9/34 · Low