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Fencer Vulns
high 8.0

CVE-2024-41592 json

DrayTek Vigor3910 devices through 4.3.2.6 have a stack-based overflow when processing query string parameters because GetCGI mishandles ext…

published 2024-10-03 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-39089

cvss
8.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

Summary

DrayTek Vigor3910 devices through 4.3.2.6 have a stack-based overflow when processing query string parameters because GetCGI mishandles extraneous ampersand characters and long key-value pairs.

Patch / fix

  • draytek vigor2952_firmware 3.9.8.2
  • draytek vigor2620_firmware 3.9.8.9
  • 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
  • draytek vigorlte200_firmware 3.9.8.9
  • draytek vigor2133_firmware 3.9.9
  • draytek vigor2762_firmware 3.9.9
  • draytek vigor2832_firmware 3.9.9
  • draytek vigor2860_firmware 3.9.8

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

1.40% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • forescout.com https://www.forescout.com/resources/draybreak-draytek-research/ referenced PoC, tagged "exploit" by a source, unverified

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-121 Stack-based Buffer Overflow

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.