CVE-2025-0890

criticalpriority · track · 15OT risk · elevatedEPSS 0.144 · 97 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

14.4% (97th) EPSS

CVSS 9.8 · critical

Is it mine?

16 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

**UNSUPPORTED WHEN ASSIGNED** Insecure default credentials for the Telnet function in the legacy DSL CPE Zyxel VMG4325-B10A firmware version 1.00(AAFR.4)C0_20170615 could allow an attacker to log in to the management interface if the administrators have the option to change the default credentials but fail to do so.

cvss

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

9.8

010

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

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · security@zyxel.com.twexploitability 3.9 · impact 5.9

ssvc

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

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-522USprimaryCWE-287USCWE-798US

exploits (1)

Public proof-of-concept and weaponised exploit code.

Danyw24/zyxel-p870hn-hardware-hackingFrom a bare PCB to root: hardware-hacking a ZyXEL P-870HN (BCM6368) over UART — CVE-2025-0890 + CVE-2024-40891, on my own hardware.PoC · poc_in_github

affected products (16)

Products and version ranges known to be affected.

Zyxel VMG4325-B10A firmware≤ ≤ 1.00(AAFR.4)C0_20170615enisa_euvdEU
Zyxel Communications Corp. Zyxel CPE Seriesall versionsfstec_bduRU
zyxel sbg3300-n000 firmwareall versionsnvdUScpe:2.3:o:zyxel:sbg3300-n000_firmware:*:*:*:*:*:*:*:*
zyxel sbg3300-nb00 firmwareall versionsnvdUScpe:2.3:o:zyxel:sbg3300-nb00_firmware:*:*:*:*:*:*:*:*
zyxel sbg3500-n000 firmwareall versionsnvdUScpe:2.3:o:zyxel:sbg3500-n000_firmware:*:*:*:*:*:*:*:*
zyxel sbg3500-nb00 firmwareall versionsnvdUScpe:2.3:o:zyxel:sbg3500-nb00_firmware:*:*:*:*:*:*:*:*
zyxel vmg1312-b10a firmwareall versionsnvdUScpe:2.3:o:zyxel:vmg1312-b10a_firmware:*:*:*:*:*:*:*:*
zyxel vmg1312-b10b firmwareall versionsnvdUScpe:2.3:o:zyxel:vmg1312-b10b_firmware:*:*:*:*:*:*:*:*
zyxel vmg1312-b10e firmwareall versionsnvdUScpe:2.3:o:zyxel:vmg1312-b10e_firmware:*:*:*:*:*:*:*:*
zyxel vmg3312-b10a firmwareall versionsnvdUScpe:2.3:o:zyxel:vmg3312-b10a_firmware:*:*:*:*:*:*:*:*
zyxel vmg3313-b10a firmwareall versionsnvdUScpe:2.3:o:zyxel:vmg3313-b10a_firmware:*:*:*:*:*:*:*:*
zyxel vmg3926-b10b firmwareall versionsnvdUScpe:2.3:o:zyxel:vmg3926-b10b_firmware:*:*:*:*:*:*:*:*
zyxel vmg4325-b10a firmwareall versionsnvdUScpe:2.3:o:zyxel:vmg4325-b10a_firmware:*:*:*:*:*:*:*:*
zyxel vmg4380-b10a firmwareall versionsnvdUScpe:2.3:o:zyxel:vmg4380-b10a_firmware:*:*:*:*:*:*:*:*
zyxel vmg8324-b10a firmwareall versionsnvdUScpe:2.3:o:zyxel:vmg8324-b10a_firmware:*:*:*:*:*:*:*:*
zyxel vmg8924-b10a firmwareall versionsnvdUScpe:2.3:o:zyxel:vmg8924-b10a_firmware:*:*:*:*:*:*:*:*

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 2025-02-04modified 2026-06-17

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+1717 more

references (3)

External citations — patches, advisories, analysis.

scry

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