CRITICALCVSS v3.1 9.8Actively exploited · CISA KEV since 2021-11-03Vulnerability

CVE-2020-29583

Zyxel firewalls (ATP, USG, VM) and AP Controllers (NXC2500 and NXC5500) contain a use of hard-coded credentials vulnerability in an undocumented account ("zyfwp") with an unchangeable password.

Properties

Vulnerability name
Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability
First seen
2025-10-21T23:35:31+00:00
Cvss score
9.8
Epss score
0.90155
Last seen
2026-10-19T12:00:27+00:00
Due date
2022-05-03
Euvd assigner
mitre
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2021-11-03T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2021-11-03
Score
9.8
Euvd base score version
3.1
Fetched at
2026-10-20T10:36:20+00:00
Cvss vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
9.8
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor project
Zyxel

Related Entities (63 · showing 23)

AFFECTS_PRODUCT (60 · showing 20)

→[Product]cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:usg_flex_100_firmware:4.60:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:vpn100:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:usg_flex_100w_firmware:4.60:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:vpn100_firmware:4.60:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:usg_flex_700_firmware:4.60:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:usg_flex_700:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:vpn50:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:vpn300:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:atp800_firmware:4.60:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:usg_flex_500:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:atp500_firmware:4.60:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:vpn50_firmware:4.60:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:usg_flex_500_firmware:4.60:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:vpn1000_firmware:4.60:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:usg60_firmware:4.60:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:usg1900_firmware:4.60:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:usg2200:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:usg1900:-:*:*:*:*:*:*:*

DESCRIBES (1)

←[KEVEntry]Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Insufficiently Protected Credentials

INVOLVES (1)

←[Signal]kev_added · 2021-11-03

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CVE-2020-29583 (CVSS v3.1 9.8) — Ninja Signal Threat Intelligence | Ninja Signal