9.8

CVE-2022-0342: zyxel atp series firmware Improper Authentication

CVSS: 9.8v3.1CriticalModified
Published 28-03-2022Last modified 02-08-2024
Open JSON

Vulnerability summary

CVE-2022-0342 is a critical (CVSS 9.8) Improper Authentication vulnerability in zyxel atp series firmware. EPSS estimates a 95.13% chance of exploitation in the next 30 days, higher than 99.8% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
95.13%
0%100%
Critical · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 28-03-2022
    PublishedVulnerability first disclosed.
  2. 02-08-2024
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

95.13%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

0.00 pp

From 95.13% on 19-09-2026

19-09-202619-10-2026
EPSS score
95.13%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Zyxel28 products

1 vendor · 28 products

References

1 links