CVE-2023-35140

5.5 mediumEPSS 0.2%

Medium (5.5) in zyxel. EPSS 0.2% chance of exploitation in the next 30 days.

The improper privilege management vulnerability in the Zyxel GS1900-24EP switch firmware version V2.70(ABTO.5) could allow an authenticated local user with read-only access to modify system settings on a vulnerable device.

Severity

CVSS 3.1

5.5 medium

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-31)
CWE: CWE-269
Published: 2023-11-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

zyxel:gs1900-10hp_firmware
zyxel:gs1900-16_firmware
zyxel:gs1900-24_firmware
zyxel:gs1900-24e_firmware
zyxel:gs1900-24ep_firmware
zyxel:gs1900-24hpv2_firmware
zyxel:gs1900-48_firmware
zyxel:gs1900-48hpv2_firmware
zyxel:gs1900-8_firmware
zyxel:gs1900-8hp_firmware

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-improper-privilege-management-vulnerability-in-gs1900-series-switches
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-improper-privilege-management-vulnerability-in-gs1900-series-switches

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