CVE-2021-35030

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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
3.5 LOW
ADJACENT_NETWORK
LOW
HIGH
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
ZyxelCNA
3.5 LOW
ADJACENT_NETWORK
LOW
HIGH
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 31%
VendorProductVersion
zyxelgs1900-8_firmware
𝑥
< 2.70
zyxelgs1900-8hp_firmware
𝑥
< 2.70
zyxelgs1900-10hp_firmware
𝑥
< 2.70
zyxelgs1900-16_firmware
𝑥
< 2.70
zyxelgs1900-24e_firmware
𝑥
< 2.70
zyxelgs1900-24ep_firmware
𝑥
< 2.70
zyxelgs1900-24_firmware
𝑥
< 2.70
zyxelgs1900-24hp_firmware
𝑥
< 2.70
zyxelgs1900-24hpv2_firmware
𝑥
< 2.70
zyxelgs1900-48_firmware
𝑥
< 2.70
zyxelgs1900-48hp_firmware
𝑥
< 2.70
zyxelgs1900-48hpv2_firmware
𝑥
< 2.70
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
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