VYPR
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Medium severity6.5NVD Advisory· Published May 24, 2022· Updated Jun 17, 2026

CVE-2022-0910

CVE-2022-0910

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.

Affected products

8
  • Zyxel/VPN seriesllm-fuzzy2 versions
    4.32 - 5.21+ 1 more
    • (no CPE)range: 4.32 - 5.21
    • (no CPE)range: 4.32 through 5.21
  • Zyxel/ZyWALL/USG seriesllm-fuzzy2 versions
    4.32 - 4.71+ 1 more
    • (no CPE)range: 4.32 - 4.71
    • (no CPE)range: 4.32 through 4.71
  • Zyxel/ATP seriesllm-fuzzy2 versions
    4.32 - 5.21+ 1 more
    • (no CPE)range: 4.32 - 5.21
    • (no CPE)range: 4.32 through 5.21
  • Zyxel/USG FLEX seriesllm-fuzzy2 versions
    4.50 - 5.21+ 1 more
    • (no CPE)range: 4.50 - 5.21
    • (no CPE)range: 4.50 through 5.21

Patches

Vulnerability mechanics

References

1

News mentions

0

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