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VulnerabilityPublished Updated

CVE-2024-51248: Draytek Vigor3900 · OS Command Injection

Source CVE Database V5

0

Not known to be exploited · CVSS 8.0 High.

Data as of 26 Oct 2026, 15:59 UTC

CVSS 3.1 base score
8.0High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.8% chance of exploitation in 30 days – higher than 56% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Nov 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 26 Oct 2026.

What to do

AI-suggested

  1. Immediately restrict access to the router’s management interface to trusted IP addresses only, ideally via VPN with strong authentication.
  2. Disable remote management if not required or move it to a secure management VLAN isolated from general user networks.
  3. Monitor network traffic and device logs for unusual commands or access patterns targeting mainfunction.cgi or modifyrow function.
  4. Apply any available firmware updates from Draytek as soon as they are released addressing this vulnerability.
  5. If patches are not yet available, consider temporary compensating controls such as web application firewalls (WAF) or intrusion prevention systems (IPS) to detect and block command injection attempts.
  6. Conduct regular security audits of network devices and enforce least privilege principles for administrative access.
  7. Educate network administrators about this vulnerability and ensure incident response plans include steps for compromised network devices.

Description

In Draytek Vigor3900 1.5.1.3, attackers can inject malicious commands into mainfunction.cgi and execute arbitrary commands by calling the modifyrow function.

References

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