CVE-2026-4795

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-26 · updated 2026-07-24
Weakness: CWE-862

Description

A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0, GS1200-8v3 firmware versions through 1.00(ACPT.2)C0, GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request.

Affected products

Zyxel GS1200-10v3 firmware: through 1.00(ACPW.2)C0
Zyxel GS1200-5HPv3 firmware: through 1.00(ACPU.2)C0
Zyxel GS1200-5v3 firmware: through 1.00(ACPS.2)C0
Zyxel GS1200-8HPv3 firmware: through 1.00(ACPV.2)C0
Zyxel GS1200-8v3 firmware: through 1.00(ACPT.2)C0

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-missing-authorization-vulnerability-in-gs1200v3-series-switches-05-26-2026

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