Skip to content
Fencer Vulns
critical 9.1

CVE-2026-71933 json

DrayTek VigorSwitch Multiple Models Missing Authorization in Syslog Functions

published 2026-08-24 2 mo ago modified 2026-10-12 27 d ago also EUVD-2026-64992

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

Multiple DrayTek VigorSwitch models contain unauthorized operation vulnerabilities in multiple syslog functions. The vulnerability is caused by missing authorization checks. A remote attacker can trigger these vulnerabilities via crafted requests to modify configuration, restart services, save startup configuration, or clear logs.

Patch / fix

  • DrayTek Corporation VigorSwitch G2540xs 3.9.10
  • DrayTek Corporation VigorSwitch P2540xs 3.9.10
  • DrayTek Corporation VigorSwitch FX2120 3.9.10
  • DrayTek Corporation VigorSwitch G2282x 2.10.6
  • DrayTek Corporation VigorSwitch P2282x 2.10.6
  • DrayTek Corporation VigorSwitch Q2300x 2.10.7
  • DrayTek Corporation VigorSwitch PQ2300xb 2.10.7
  • DrayTek Corporation VigorSwitch G2542x 3.10.6
  • DrayTek Corporation VigorSwitch P2542x 3.10.6
  • DrayTek Corporation VigorSwitch P2542xh 3.10.6
  • DrayTek Corporation VigorSwitch PX2060 2.9.10
  • DrayTek Corporation VigorSwitch G1280 2.9.10
  • DrayTek Corporation VigorSwitch P1280 2.9.10
  • DrayTek Corporation VigorSwitch P1281x 2.9.10
  • DrayTek Corporation VigorSwitch G1282 2.9.10
  • DrayTek Corporation VigorSwitch P1282 2.9.10
  • DrayTek Corporation VigorSwitch G2121 2.9.10
  • DrayTek Corporation VigorSwitch P2121 2.9.10
  • DrayTek Corporation VigorSwitch PQ2121x 2.9.10
  • DrayTek Corporation VigorSwitch Q2121x 2.9.10
  • DrayTek Corporation VigorSwitch G2280x 2.9.10
  • DrayTek Corporation VigorSwitch P2280x 2.9.10
  • DrayTek Corporation VigorSwitch Q2200x 2.9.10
  • DrayTek Corporation VigorSwitch PQ2200xb 2.9.10
  • DrayTek Corporation VigorSwitch G2100 2.9.10
  • DrayTek Corporation VigorSwitch P2100 2.9.10
  • DrayTek Corporation VigorSwitch G2540x 2.9.10
  • DrayTek Corporation VigorSwitch P2540x 2.9.10

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CNA 4.0 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • DrayTek Corporation VigorSwitch G2540xs
  • DrayTek Corporation VigorSwitch P2540xs
  • DrayTek Corporation VigorSwitch FX2120
  • DrayTek Corporation VigorSwitch G2282x
  • DrayTek Corporation VigorSwitch P2282x
  • DrayTek Corporation VigorSwitch Q2300x
  • DrayTek Corporation VigorSwitch PQ2300xb
  • DrayTek Corporation VigorSwitch G2542x
  • DrayTek Corporation VigorSwitch P2542x
  • DrayTek Corporation VigorSwitch P2542xh
  • DrayTek Corporation VigorSwitch PX2060
  • DrayTek Corporation VigorSwitch G1280
  • DrayTek Corporation VigorSwitch P1280
  • DrayTek Corporation VigorSwitch P1281x
  • DrayTek Corporation VigorSwitch G1282
  • DrayTek Corporation VigorSwitch P1282
  • DrayTek Corporation VigorSwitch G2121
  • DrayTek Corporation VigorSwitch P2121
  • DrayTek Corporation VigorSwitch PQ2121x
  • DrayTek Corporation VigorSwitch Q2121x
  • DrayTek Corporation VigorSwitch G2280x
  • DrayTek Corporation VigorSwitch P2280x
  • DrayTek Corporation VigorSwitch Q2200x
  • DrayTek Corporation VigorSwitch PQ2200xb
  • DrayTek Corporation VigorSwitch G2100
  • DrayTek Corporation VigorSwitch P2100
  • DrayTek Corporation VigorSwitch G2540x
  • DrayTek Corporation VigorSwitch P2540x

Classification

Weakness

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.