VulnerabilityModified

CVE-2022-0342

CRITICAL 9.8EPSS 95.1%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 95.1%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.

Description

An authentication bypass vulnerability in the CGI program of Zyxel USG/ZyWALL series firmware versions 4.20 through 4.70, USG FLEX series firmware versions 4.50 through 5.20, ATP series firmware versions 4.32 through 5.20, VPN series firmware versions 4.30 through 5.20, and NSG series firmware versions V1.20 through V1.33 Patch 4, which could allow an attacker to bypass the web authentication and obtain administrative access of the device.

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 95.13% probability · 100th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-287
Affected: zyxel/usg40 firmware · zyxel/usg40w firmware · zyxel/usg60 firmware · zyxel/usg60w firmware · zyxel/zywall 110 firmware · zyxel/zywall 310 firmware · zyxel/zywall 1100 firmware · zyxel/usg flex 100 firmware · zyxel/usg flex 200 firmware · zyxel/usg flex 500 firmware · zyxel/usg flex 100w firmware · zyxel/usg flex 700 firmware · zyxel/atp100 firmware · zyxel/atp100w firmware · zyxel/atp200 firmware · zyxel/atp500 firmware · zyxel/atp700 firmware · zyxel/atp800 firmware · zyxel/vpn50 firmware · zyxel/vpn100 firmware · +3 more
Source: security@zyxel.com.tw

EPSS trend

EPSS 95.1% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.