Skip to content
Fencer Vulns
critical 10.0

CVE-2022-32548 in the critical feed json

An issue was discovered on certain DrayTek Vigor routers before July 2022 such as the Vigor3910 before 4.3.1.1.

published 2022-08-29 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-35616

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
34.0%
EPSS 34.0% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

An issue was discovered on certain DrayTek Vigor routers before July 2022 such as the Vigor3910 before 4.3.1.1. /cgi-bin/wlogin.cgi has a buffer overflow via the username or password to the aa or ab field.

Patch / fix

  • draytek vigor3910_firmware 4.3.1.1
  • draytek vigor1000b_firmware 4.3.1.1
  • draytek vigor2962_firmware 4.3.1.1
  • draytek vigor2962p_firmware 4.3.1.1
  • draytek vigor2927_firmware 4.4.0
  • draytek vigor2927ax_firmware 4.4.0
  • draytek vigor2927ac_firmware 4.4.0
  • draytek vigor2927vac_firmware 4.4.0
  • draytek vigor2927l_firmware 4.4.0
  • draytek vigor2927lac_firmware 4.4.0
  • draytek vigor2915_firmware 4.3.3.2
  • draytek vigor2915ac_firmware 4.3.3.2
  • draytek vigor2952_firmware 3.9.7.2
  • draytek vigor2952p_firmware 3.9.7.2
  • draytek vigor3220_firmware 3.9.7.2
  • draytek vigor2926_firmware 3.9.8.1
  • draytek vigor2926n_firmware 3.9.8.1
  • draytek vigor2926ac_firmware 3.9.8.1
  • draytek vigor2926vac_firmware 3.9.8.1
  • draytek vigor2926l_firmware 3.9.8.1

Exploit prediction

33.99% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • securityweek.com https://www.securityweek.com/smbs-exposed-attacks-critical-vulnerability-draytek-vigor-routers referenced PoC, tagged "exploit" by a source, unverified
  • trellix.com https://www.trellix.com/en-us/about/newsroom/stories/threat-labs/rce-in-dratyek-routers.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:C/UI:N
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 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.