Vulnerability Intelligence Report
CVE-2022-0910
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.
No Active Exploit Signals
CVSS Base Score
6.5
MEDIUM
Exploitability:2.9
Impact Score:3.6
EPSS Probability:0.66%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-287 ↗CWE-287: Improper Authentication
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Zyxel | USG/ZyWALL series firmware | 4.32 through 4.71 (affected) |
| Zyxel | USG FLEX series firmware | 4.50 through 5.21 (affected) |
| Zyxel | ATP series firmware | 4.32 through 5.21 (affected) |
| Zyxel | VPN series firmware | 4.32 through 5.21 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.657%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Zyxel Corporation · Vendor · Taiwan |
| Reserved | 2022-03-10T00:00:00 |
| Published | 2022-05-24T02:20:13 |
| Last Updated | 2024-08-02T23:47:42 |
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