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Fencer Vulns
high 8.0

CVE-2024-41588 json

The CGI endpoints v2x00.cgi and cgiwcg.cgi of DrayTek Vigor3910 devices through 4.3.2.6 are vulnerable to buffer overflows, by authenticate…

published 2024-10-03 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-39085

cvss
8.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

The CGI endpoints v2x00.cgi and cgiwcg.cgi of DrayTek Vigor3910 devices through 4.3.2.6 are vulnerable to buffer overflows, by authenticated users, because of missing bounds checking on parameters passed through POST requests to the strncpy function.

Patch / fix

  • draytek vigor2915_firmware 4.4.5.3
  • draytek vigor2866_firmware 4.4.5.2
  • draytek vigor2766_firmware 4.4.5.3
  • draytek vigor2865_firmware 4.4.5.2
  • draytek vigor2765_firmware 4.4.5.3
  • draytek vigor2763_firmware 4.4.5.3
  • draytek vigor2135_firmware 4.4.5.3
  • draytek vigor166_firmware 4.2.7
  • draytek vigor3912_firmware 4.3.6.1
  • draytek vigor1000b_firmware 4.3.2.8, 4.4.3.1
  • draytek vigor165_firmware 4.2.7
  • draytek vigor3910_firmware 4.3.2.8, 4.4.3.1
  • draytek vigor2962_firmware 4.3.2.8, 4.4.3.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • draytek vigor3910_firmware

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.