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Fencer Vulns
critical 9.8

CVE-2024-51139 json

Buffer Overflow vulnerability in Vigor2620/LTE200 3.9.8.9 and earlier and Vigor2860/2925 3.9.8 and earlier and Vigor2862/2926 3.9.9.5 and e…

published 2025-02-27 20 mo ago modified 2026-07-05 4 mo ago also EUVD-2025-5949

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
0
none known

Summary

Buffer Overflow vulnerability in Vigor2620/LTE200 3.9.8.9 and earlier and Vigor2860/2925 3.9.8 and earlier and Vigor2862/2926 3.9.9.5 and earlier and Vigor2133/2762/2832 3.9.9 and earlier and Vigor165/166 4.2.7 and earlier and Vigor2135/2765/2766 4.4.5.1 and earlier and Vigor2865/2866/2927 4.4.5.3 and earlier and Vigor2962/3910 4.3.2.8/4.4.3.1 and earlier and Vigor3912 4.3.6.1 and earlier allows a remote attacker to execute arbitrary code via the CGI parser's handling of the "Content-Length" header of HTTP POST requests.

Patch / fix

  • draytek vigor2620_firmware 3.9.9.1
  • draytek vigorlte200_firmware 3.9.9.1
  • draytek vigor2860_firmware 3.9.8.3
  • draytek vigor2925_firmware 3.9.8.3
  • draytek vigor2862_firmware 3.9.9.8
  • draytek vigor2926_firmware 3.9.9.8
  • draytek vigor2133_firmware 3.9.9.2
  • draytek vigor2762_firmware 3.9.9.2
  • draytek vigor2832_firmware 3.9.9.2
  • draytek vigor2135_firmware 4.4.5.5
  • draytek vigor2765_firmware 4.4.5.5
  • draytek vigor2766_firmware 4.4.5.5
  • draytek vigor2763_firmware 4.4.5.5
  • draytek vigor2865_firmware 4.4.5.8
  • draytek vigor2866_firmware 4.4.5.8
  • draytek vigor2927_firmware 4.4.5.8
  • draytek vigor2962_firmware 4.3.2.9, 4.4.3.2
  • draytek vigor3910_firmware 4.3.2.9, 4.4.3.2
  • draytek vigor3912_firmware 4.4.3.2
  • draytek vigor2915_firmware 4.4.5

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
20 mo ago

Exploit prediction

1.00% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.