CVE-2023-28770

highpriority · attend · 60EPSS 0.578 · 99 %ileexploit · weaponizedDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · weaponized

Likely / severe?

57.8% (99th) EPSS

CVSS 7.5 · high

Is it mine?

4 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

The sensitive information exposure vulnerability in the CGI “Export_Log” and the binary “zcmd” in Zyxel DX5401-B0 firmware versions prior to V5.17(ABYO.1)C0 could allow a remote unauthenticated attacker to read the system files and to retrieve the password of the supervisor from the encrypted file.

cvss

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

7.5

010

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

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondaryexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · security@zyxel.com.twexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Hsecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200USCWE-200USCWE-203US

exploits (1)

Public proof-of-concept and weaponised exploit code.

exploit/linux/http/zyxel_lfi_unauth_ssh_rceZyxel chained RCE using LFI and weak password derivation algorithmweaponized · metasploit

affected products (4)

Products and version ranges known to be affected.

Zyxel Firewall VPN2Sall versionscert_bundDEcpe:/h:zyxel:firewall:vpn2s
Zyxel DX5401-B0 firmware≤ < V5.17(ABYO.1)C0enisa_euvdEU
Zyxel Communications Corp. DX5401-B0≤ 5.17(ABYO.1)C0fstec_bduRU
zyxel dx5401-b0 firmware< 5.17\(abyo.1\)c0nvdUScpe:2.3:o:zyxel:dx5401-b0_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1091Zyxel Firewall Produkte: Mehrere SchwachstellenDeutsch2022-02-15csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Zyxel Firewall Produkten ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, seine Privilegien zu erweitern und 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 cert_bund nvd NVD CVE.org MITRE

published 2023-04-27modified 2026-06-17

references (8)

External citations — patches, advisories, analysis.

scry

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