Vulnerability Intelligence Report
CVE-2021-35029
An authentication bypasss vulnerability in the web-based management interface of Zyxel USG/Zywall series firmware versions 4.35 through 4.64 and USG Flex, ATP, and VPN series firmware versions 4.35 through 5.01, which could allow a remote attacker to execute arbitrary commands on an affected device.
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:2.25%
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 | 4.35 through 4.64 (affected) |
| Zyxel | USG FLEX series Firmware | 4.35 through 5.01 (affected) |
| Zyxel | ATP series Firmware | 4.35 through 5.01 (affected) |
| Zyxel | VPN series Firmware | 4.35 through 5.01 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
2.255%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Zyxel Corporation · Vendor · Taiwan |
| Reserved | 2021-06-17T00:00:00 |
| Published | 2021-07-02T10:29:07 |
| Last Updated | 2024-08-04T00:33:49 |
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