Improper Privilege Management in ZyXEL Communications Corp. products - CVE-2023-35140

Vulnerability identifier: #VU82796

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-35140

CWE-ID: CWE-269

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to improper privilege management. A local user can escalate privileges.

GS1900-8
GS1900-8HP
GS1900-16
GS1900-24E
GS1900-24
GS1900-48
GS1900-10HP
GS1900-24EP
GS1900-24HPv2
GS1900-48HPv2

Install updates from vendor's website.

GS1900-8 - update to 2.80(AAHH.0)
GS1900-8HP - update to 2.80(AAHI.0)
GS1900-16 - update to 2.80(AAHJ.0)
GS1900-24E - update to 2.80(AAHK.0)
GS1900-24 - update to 2.80(AAHL.0)
GS1900-48 - update to 2.80(AAHN.0)
GS1900-10HP - update to 2.80(AAZI.0)
GS1900-24EP - update to 2.80(ABTO.0)
GS1900-24HPv2 - update to 2.80(ABTP.0)
GS1900-48HPv2 - update to 2.80(ABTQ.0)

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

• Privilege escalation in Zyxel GS1900 series switches