CVE-2022-40603

mediumpriority · track · 24EPSS 0.004 · 33 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.39% (33rd) EPSS

CVSS 6.1 · medium

Is it mine?

28 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A cross-site scripting (XSS) vulnerability in the CGI program of Zyxel ZyWALL/USG series firmware versions 4.30 through 4.72, VPN series firmware versions 4.30 through 5.31, USG FLEX series firmware versions 4.50 through 5.31, and ATP series firmware versions 4.32 through 5.31, which could allow an attacker to trick a user into visiting a crafted URL with the XSS payload. Then, the attacker could gain access to some browser-based information if the malicious script is executed on the victim’s browser.

cvss

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

6.1

010

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

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 2.7

v3.14.7mediumAV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.14.7mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:Nsecondary · ENISA EU

v3.14.7mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:Nsecondary · security@zyxel.com.twexploitability 2.8 · impact 1.4

v3.15.6mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimaryCWE-79US

affected products (28)

Products and version ranges known to be affected.

Zyxel ATP series firmware≤ 4.32 through 5.31enisa_euvdEU
Zyxel USG FLEX series firmware≤ 4.50 through 5.31enisa_euvdEU
Zyxel VPN series Firmware≤ 4.30 through 5.31enisa_euvdEU
Zyxel ZyWALL/USG series firmware≤ 4.30 through 4.72enisa_euvdEU
Zyxel Communications Corp. ATP4.32 → 5.31fstec_bduRU
Zyxel Communications Corp. USG4.30 → 4.72fstec_bduRU
Zyxel Communications Corp. USG FLEX4.50 → 5.31fstec_bduRU
Zyxel Communications Corp. VPN4.30 → 5.31fstec_bduRU
Zyxel Communications Corp. ZyWALL4.30 → 4.72fstec_bduRU
zyxel atp100 firmware4.32 → 5.31nvdUScpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*
zyxel atp100w firmware4.32 → 5.31nvdUScpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:*
zyxel atp200 firmware4.32 → 5.31nvdUScpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*
zyxel atp500 firmware4.32 → 5.31nvdUScpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*
zyxel atp700 firmware4.32 → 5.31nvdUScpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:*
zyxel atp800 firmware4.32 → 5.31nvdUScpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:*
zyxel usg flex 100w firmware4.50 → 5.31nvdUScpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*
zyxel usg flex 200 firmware4.50 → 5.31nvdUScpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*
zyxel usg flex 500 firmware4.50 → 5.31nvdUScpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*
zyxel usg flex 50w firmware4.50 → 5.31nvdUScpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*
zyxel usg flex 700 firmware4.50 → 5.31nvdUScpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*

showing 20 of 28

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-2233Zyxel Firewall: Schwachstelle ermöglicht Cross-Site ScriptingDeutsch2022-12-05csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Zyxel Firewall ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen.

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 cert_bund NVD CVE.org MITRE

published 2022-12-06modified 2026-06-17

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+53004 more

references (5)

External citations — patches, advisories, analysis.

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