CRITICALCVSS 9.8Actively exploited · CISA KEV since 2022-03-25Vulnerability

CVE-2020-9054

Multiple Zyxel network-attached storage (NAS) devices contain a pre-authentication command injection vulnerability, which may allow a remote, unauthenticated attacker to execute arbitrary code.

Properties

Euvd product
NSA221, NSA325, NAS540, NAS542, NSA220, NAS326, NSA310, NSA220+, NSA325v2, NSA320, NAS520, NSA210, NSA320S
Vulnerability name
Zyxel Multiple NAS Devices OS Command Injection Vulnerability
First seen
2026-10-07T17:32:05+00:00
Cvss score
9.8
Epss score
0.99988
Last seen
2026-10-19T12:00:27+00:00
Due date
2022-04-15
Euvd assigner
certcc
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2022-03-25T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2022-03-25
Score
9.8
Euvd base score version
3.1
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Zyxel
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

Related Entities (57 · showing 23)

AFFECTS_PRODUCT (54 · showing 20)

→[Product]cpe:2.3:o:zyxel:usg210_firmware:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:usg310:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:zywall1100_firmware:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:usg40:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:usg1100_firmware:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:usg2200:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:usg1900:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:usg110:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:nas520:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:nas540_firmware:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:nas326:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:usg20-vpn:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:usg20-vpn_firmware:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:nas542:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:zyxel:usg20w-vpn_firmware:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:*

DESCRIBES (1)

←[KEVEntry]Zyxel Multiple NAS Devices OS Command Injection Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

INVOLVES (1)

←[Signal]kev_added · 2022-03-25

Explore deeper with Ninja Signal's threat intelligence graph

Search in SpektrOpen Signal Desktop
CVE-2020-9054 (CVSS 9.8) — Ninja Signal Threat Intelligence | Ninja Signal