Post-authentication Command Injection Vulnerability
Source GCVE Database
Not known to be exploited · CVSS 8.8 High.
Data as of 13 Nov 2026, 19:51 UTC
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 18 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
AI-suggested
Until an official fix is available, restrict access to the device's management interface to trusted users only and monitor for suspicious activity. Avoid exposing the device management interface to untrusted networks.
Description
A post-authentication command injection vulnerability exists in the "priv" parameter of Zyxel DX3300-T0 firmware version 5.50(ABVY.6.3)C0 and earlier. This flaw allows an authenticated attacker to execute arbitrary operating system commands on the affected device, potentially leading to full compromise. The vulnerability has a high severity score of 8.8 (CVSS 3.1) and impacts confidentiality, integrity, and availability. No patch or remediation information is provided in the available data.
References
- nvd.nist.gov/vuln/detail/CVE-2025-8693 (opens in a new tab)
- zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-uncontrolled-resource-consumption-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-11-18-2025 (opens in a new tab)