Skip to content
Fencer Vulns
medium 4.9

CVE-2026-71932 json

DrayTek VigorSwitch Multiple Models Path Traversal via getSyslogFile

published 2026-08-24 2 mo ago modified 2026-10-12 27 d ago also EUVD-2026-64991

cvss
4.9
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 64%
public exploits
0
none known

Summary

Multiple DrayTek VigorSwitch models contain a directory traversal vulnerability in the getSyslogFile function. The vulnerability is caused by insufficient validation of the option field. A remote attacker can trigger this vulnerability via crafted input containing path traversal sequences to access arbitrary files on the device. Exploitation requires valid administrative credentials for the device's web management interface.

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
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CNA 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/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
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

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.