Buffer Overflow Vulnerability in Zyxel ATP and USG FLEX Series Firmware
CVE-2023-37926

5.5MEDIUM

Key Information:

Vendor
Zyxel
Status
ATP series firmware
USG FLEX series firmware
USG FLEX 50(W) series firmware
USG20(W)-VPN series firmware
Vendor
CVE Published:
28 November 2023

Summary

A critical buffer overflow vulnerability in specific firmware versions of Zyxel's ATP and USG FLEX series could potentially allow local authenticated attackers to trigger denial-of-service (DoS) conditions. By executing a tailored CLI command designed to dump system logs, attackers could exploit this flaw, impacting the normal operation of affected devices. Users are advised to review their firmware versions and update to secure their systems against potential exploitation.

Affected Version(s)

ATP series firmware versions 4.32 through 5.37

USG FLEX 50(W) series firmware versions 4.16 through 5.37

USG FLEX series firmware versions 4.50 through 5.37

References

https://www.zyxel.com/global/en/support/security-advisori...
vendor-advisory

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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