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Vulnerability · Published Jul 17, 2023 · Assigned by Zyxel

CVE-2023-33011

High 8.8

In plain English

A high-severity security flaw in ATP series firmware from Zyxel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.3%top 72.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A format string vulnerability in the Zyxel ATP series firmware versions 5.10 through 5.36 Patch 2, USG FLEX series firmware versions 5.00 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 5.10 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 5.10 through 5.36 Patch 2, and VPN series firmware versions 5.00 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands by using a crafted PPPoE configuration on an affected device when the cloud management mode is enabled.

Affected products (as reported)

VendorProductVersions
Zyxel ATP series firmware 5.10 through 5.36 Patch 2
Zyxel USG FLEX series firmware 5.00 through 5.36 Patch 2
Zyxel USG FLEX 50(W) series firmware 5.10 through 5.36 Patch 2
Zyxel USG20(W)-VPN series firmware 5.10 through 5.36 Patch 2
Zyxel VPN series firmware 5.00 through 5.36 Patch 2

Weakness: CWE-134 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References