CVE-2020-13364

A backdoor in certain Zyxel products allows remote TELNET access via a CGI script

Medium · published August 6, 2020

CVSS v3.0
6.5
EPSS
1%
Percentile
66.7
In the wild
Unconfirmed
What it is

A backdoor in certain Zyxel products allows remote TELNET access via a CGI script. This affects NAS520 V5.21(AASZ.4)C0, V5.21(AASZ.0)C0, V5.11(AASZ.3)C0, and V5.11(AASZ.0)C0; NAS542 V5.11(ABAG.0)C0, V5.20(ABAG.1)C0, and V5.21(ABAG.3)C0; NSA325 v2_V4.81(AALS.0)C0 and V4.81(AAAJ.1)C0; NSA310 4.22(AFK.0)C0 and 4.22(AFK.1)C0; NAS326 V5.21(AAZF.8)C0, V5.11(AAZF.4)C0, V5.11(AAZF.2)C0, and V5.11(AAZF.3)C0; NSA310S V4.75(AALH.2)C0; NSA320S V4.75(AANV.2)C0 and V4.75(AANV.1)C0; NSA221 V4.41(AFM.1)C0; and NAS540 V5.21(AATB.5)C0 and V5.21(AATB.3)C0.

The record
Technical detail
CVSS v3.0
6.5 · MEDIUM
Vector
CVSS:3.0/AC:L/AV:N/A:N/C:L/I:L/PR:N/S:U/UI:N
CVSS v4.0
Not supplied
EPSS
0.01151 · 66.7th percentile
Published
2020-08-06T16:54Z
EPSS history
Timeline
  • 06 AUG 16:54Z
    A backdoor in certain Zyxel products allows remote TELNET access via a CGI script
    cvelistv5