CVE-2021-35030
Zyxel · published 2021-07-26
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by Zyxel Corporation via the CVE Program.
A vulnerability was found in the CGI program in Zyxel GS1900-8 firmware version V2.60, that did not properly sterilize packet contents and could allow an authenticated, local user to perform a cross-site scripting (XSS) attack via a crafted LLDP packet.
Status at the source
- NVD status: Modified
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | GS1900-8 Firmware | 2.60: affected |
Products named in NVD's CPE match criteria (12)
cpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:gs1900-24ep_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:gs1900-24hp_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:gs1900-24hpv2_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:gs1900-48hp_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:gs1900-48hpv2_firmware:*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 3.5 LOW — as published by Zyxel Corporation (Secondary)
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L - CVSS 3.1: 4.3 MEDIUM — as published by NIST (Primary)
CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0: 2.3 LOW — as published by NIST (Primary)
AV:A/AC:M/Au:S/C:N/I:P/A:N
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://www.zyxel.com/support/Zyxel_security_advisory_for_XSS_vulnerability_of_GS1900_series_switches.shtml
- https://www.zyxel.com/support/Zyxel_security_advisory_for_XSS_vulnerability_of_GS1900_series_switches.shtml
Source dates: published 2021-07-26, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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