CVE-2022-0910: zyxel atp series firmware Improper Authentication
Vulnerability summary
CVE-2022-0910 is a medium (CVSS 6.5) Improper Authentication vulnerability in zyxel atp series firmware. EPSS estimates a 0.73% chance of exploitation in the next 30 days, higher than 53.2% of scored vulnerabilities.
Timeline
- 24-05-2022PublishedVulnerability first disclosed.
- 02-08-2024Last modifiedVulnerability information updated.
Description
A downgrade from two-factor authentication to one-factor authentication vulnerability in the CGI program of Zyxel USG/ZyWALL series firmware versions 4.32 through 4.71, USG FLEX series firmware versions 4.50 through 5.21, ATP series firmware versions 4.32 through 5.21, and VPN series firmware versions 4.32 through 5.21, that could allow an authenticated attacker to bypass the second authentication phase to connect the IPsec VPN server even though the two-factor authentication (2FA) was enabled.
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
0.73%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
+0.03 pp
From 0.70% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Zyxel36 products
- atp series firmware4.32 through 5.21
- atp100_firmware≥ 4.32, ≤ 5.21
- atp100w_firmware≥ 4.32, ≤ 5.21
- atp200_firmware≥ 4.32, ≤ 5.21
- atp500_firmware≥ 4.32, ≤ 5.21
1 vendor · 36 products
References
1 links- www.zyxel.com/support/multiple-vulnerabilities-of-firewalls-AP-controllers-and-APs.shtmlX Refsource CONFIRMVendor Advisory