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Fencer Vulns
high 8.8

CVE-2026-27650 json

OS Command Injection vulnerability exists in BUFFALO Wi-Fi router products.

published 2026-03-27 7 mo ago modified 2026-10-26 13 d ago also EUVD-2026-16543

cvss
8.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

OS Command Injection vulnerability exists in BUFFALO Wi-Fi router products. If this vulnerability is exploited, an arbitrary OS command may be executed on the products.

Patch / fix

  • buffalo wcr-1166dhpl_firmware 1.01
  • buffalo wsr3600be4-kh_firmware 6.02
  • buffalo wsr3600be4p_firmware 5.02
  • buffalo wxr-1750dhp_firmware 2.63
  • buffalo wxr-1750dhp2_firmware 2.63
  • buffalo wxr18000be10p_firmware 5.03
  • buffalo wxr-1900dhp_firmware 2.53
  • buffalo wxr-1900dhp2_firmware 2.62
  • buffalo wxr-1900dhp3_firmware 2.66
  • buffalo wxr-5950ax12_firmware 3.57
  • buffalo wxr-6000ax12b_firmware 3.57
  • buffalo wxr-6000ax12p_firmware 3.57
  • buffalo wxr-6000ax12s_firmware 3.57
  • buffalo wzr-1166dhp_firmware 2.20
  • buffalo wzr-1166dhp2_firmware 2.20
  • buffalo wzr-1750dhp_firmware 2.32
  • buffalo wzr-1750dhp2_firmware 2.33
  • buffalo wzr-s1750dhp_firmware 2.34
  • buffalo wrm-d2133hp_firmware 3.01
  • buffalo wrm-d2133hs_firmware 3.01

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
7 mo ago

Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 4.0 8.6 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 4.0 8.6 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/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
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • BUFFALO INC. BUFFALO Wi-Fi router products

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

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.