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…

PriorityP341medium6.5CVSS 3.1

AVNACLPRLUINSUCNIHAN

EPSS

0.67%

47.9th percentile

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

36 ranges· showing 25

Vendor	Product	Version range	Fixed in
zyxel	atp100_firmware	4.32 – 5.21	—
zyxel	atp100w_firmware	4.32 – 5.21	—
zyxel	atp200_firmware	4.32 – 5.21	—
zyxel	atp500_firmware	4.32 – 5.21	—
zyxel	atp700_firmware	4.32 – 5.21	—
zyxel	atp800_firmware	4.32 – 5.21	—
zyxel	atp_series_firmware	—	—
zyxel	usg200_firmware	4.32 – 4.71	—
zyxel	usg20_firmware	4.32 – 4.71	—
zyxel	usg210_firmware	4.32 – 4.71	—
zyxel	usg2200_firmware	4.32 – 4.71	—
zyxel	usg300_firmware	4.32 – 4.71	—
zyxel	usg310_firmware	4.32 – 4.71	—
zyxel	usg_1100_firmware	4.32 – 4.71	—
zyxel	usg_110_firmware	4.32 – 4.71	—
zyxel	usg_1900_firmware	4.32 – 4.71	—
zyxel	usg_20w-vpn_firmware	4.32 – 4.71	—
zyxel	usg_20w_firmware	4.32 – 4.71	—
zyxel	usg_2200-vpn_firmware	4.32 – 4.71	—
zyxel	usg_310_firmware	4.32 – 4.71	—
zyxel	usg_40_firmware	4.32 – 4.71	—
zyxel	usg_40w_firmware	4.32 – 4.71	—
zyxel	usg_60_firmware	4.32 – 4.71	—
zyxel	usg_60w_firmware	4.32 – 4.71	—
zyxel	usg_flex_100_firmware	4.50 – 5.21	—

CVSS provenance

nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

nvdv2.04.0MEDIUMAV:N/AC:L/Au:S/C:N/I:P/A:N

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