CVE-2023-22918

What it is

A post-authentication information exposure vulnerability in the CGI program 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, VPN series firmware versions 4.30 through 5.35, NWA110AX firmware version 6.50(ABTG.2) and earlier versions, WAC500 firmware version 6.50(ABVS.0) and earlier versions, and WAX510D firmware version 6.50(ABTF.2) and earlier versions, which could allow a remote authenticated attacker to retrieve encrypted information of the administrator on an affected device.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure.

Exploit odds

0.8% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2023-04-24 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 05:36 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.8% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2023-04-24 18:15 UTC

Last modified

2026-06-17 05:36 UTC

Exploit probability

0.8% · EPSS, next 30 days

Weakness

CWE-359

Record status

Modified

Affected

• Zyxel atp200 Firmware < 5.36
• Zyxel atp100 Firmware < 5.36
• Zyxel atp700 Firmware < 5.36
• Zyxel atp500 Firmware < 5.36
• Zyxel atp100w Firmware < 5.36
• Zyxel atp800 Firmware < 5.36
• Zyxel Usg Flex 100 Firmware < 5.36
• Zyxel Usg Flex 50 Firmware < 5.36

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2023-22918.md and follow it. Check whether this project is affected by CVE-2023-22918. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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