CVE-2022-0910

mediumpriority · track · 26EPSS 0.007 · 54 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.73% (54th) EPSS

CVSS 4 · medium

Is it mine?

41 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.16.5mediumAV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · security@zyxel.com.twexploitability 2.8 · impact 3.6

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USprimaryCWE-287US

affected products (41)

Products and version ranges known to be affected.

Zyxel ATP series firmware≤ 4.32 through 5.21enisa_euvdEU
Zyxel USG FLEX series firmware≤ 4.50 through 5.21enisa_euvdEU
Zyxel USG/Zywall series Firmware≤ 4.32 through 4.71enisa_euvdEU
Zyxel VPN series Firmware≤ 4.32 through 5.21enisa_euvdEU
Zyxel Communications Corp. ATP4.32 → 5.21fstec_bduRU
Zyxel Communications Corp. USG4.32 → 4.71fstec_bduRU
Zyxel Communications Corp. USG FLEX4.50 → 5.21fstec_bduRU
Zyxel Communications Corp. VPN4.32 → 5.21fstec_bduRU
Zyxel Communications Corp. ZyWALL4.32 → 4.71fstec_bduRU
zyxel atp100 firmware4.32 → 5.21nvdUScpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*
zyxel atp100w firmware4.32 → 5.21nvdUScpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:*
zyxel atp200 firmware4.32 → 5.21nvdUScpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*
zyxel atp500 firmware4.32 → 5.21nvdUScpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*
zyxel atp700 firmware4.32 → 5.21nvdUScpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:*
zyxel atp800 firmware4.32 → 5.21nvdUScpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:*
zyxel usg 110 firmware4.32 → 4.71nvdUScpe:2.3:o:zyxel:usg_110_firmware:*:*:*:*:*:*:*:*
zyxel usg 1100 firmware4.32 → 4.71nvdUScpe:2.3:o:zyxel:usg_1100_firmware:*:*:*:*:*:*:*:*
zyxel usg 1900 firmware4.32 → 4.71nvdUScpe:2.3:o:zyxel:usg_1900_firmware:*:*:*:*:*:*:*:*
zyxel usg 20w firmware4.32 → 4.71nvdUScpe:2.3:o:zyxel:usg_20w_firmware:*:*:*:*:*:*:*:*
zyxel usg 20w-vpn firmware4.32 → 4.71nvdUScpe:2.3:o:zyxel:usg_20w-vpn_firmware:*:*:*:*:*:*:*:*

showing 20 of 41

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2022-05-24modified 2026-06-17

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references (5)

External citations — patches, advisories, analysis.

scry

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