CVE-2023-22918

mediumpriority · track · 26EPSS 0.008 · 55 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.77% (55th) EPSS

CVSS 6.5 · medium

Is it mine?

94 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A post-authentication information exposure vulnerability in the CGI program of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, USG20(W)-VPN firmware versions 4.16 through 5.35, VPN series firmware versions 4.30 through 5.35, NWA110AX firmware version 6.50(ABTG.2) and earlier versions, WAC500 firmware version 6.50(ABVS.0) and earlier versions, and WAX510D firmware version 6.50(ABTF.2) and earlier versions, which could allow a remote authenticated attacker to retrieve encrypted information of the administrator on an affected device.

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

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

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

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

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-359USCWE-359US

affected products (94)

Products and version ranges known to be affected.

Zyxel ATP series firmware≤ 4.32 through 5.35enisa_euvdEU
Zyxel NWA110AX firmware≤ ≤ 6.50(ABTG.2)enisa_euvdEU
Zyxel USG FLEX 50(W) firmware≤ 4.16 through 5.35enisa_euvdEU
Zyxel USG FLEX series firmware≤ 4.50 through 5.35enisa_euvdEU
Zyxel USG20(W)-VPN firmware≤ 4.16 through 5.35enisa_euvdEU
Zyxel VPN series Firmware≤ 4.30 through 5.35enisa_euvdEU
Zyxel WAC500 firmware≤ ≤ 6.50(ABVS.0)enisa_euvdEU
Zyxel WAX510D firmware≤ ≤ 6.50(ABTF.2)enisa_euvdEU
Zyxel Communications Corp. ATP4.32 → 5.35fstec_bduRU
Zyxel Communications Corp. NAP203≤ 6.28(ABFA.0)fstec_bduRU
Zyxel Communications Corp. NAP303≤ 6.28(ABEX.0)fstec_bduRU
Zyxel Communications Corp. NAP353≤ 6.28(ABEY.0)fstec_bduRU
Zyxel Communications Corp. NWA1123-AC PRO≤ 6.28(ABHD.0)fstec_bduRU
Zyxel Communications Corp. NWA5123-AC HD≤ 6.25(ABIM.9)fstec_bduRU
Zyxel Communications Corp. USG 20(W)-VPN4.16 → 5.35fstec_bduRU
Zyxel Communications Corp. USG FLEX4.50 → 5.35fstec_bduRU
Zyxel Communications Corp. USG FLEX 50(W)4.16 → 5.35fstec_bduRU
Zyxel Communications Corp. VPN4.30 → 5.35fstec_bduRU
Zyxel Communications Corp. WAC6103D-I≤ 6.28(AAXH.0)fstec_bduRU
Zyxel Communications Corp. WAC6303D-S≤ 6.25(ABGL.9)fstec_bduRU

showing 20 of 94

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1070Zyxel Firewalls: Mehrere SchwachstellenDeutsch2023-04-24csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Zyxel Firewall ausnutzen, um beliebigen Programmcode auszuführen, Informationen offenzulegen, einen Denial of Service zu verursachen, einen Cross Site Scripting Angriff durchzuführen oder die Konfiguration zu manipulieren.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2023-04-24modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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