All vulnerabilities
CVE-2026-86530

WSR-300HP: BUFFALO Wi-Fi products handle some web form input improperly to assemble command line strings internally. An administrative user may send a crafted HTTP request and execute an arbitrary OS command.

BUFFALO INC. WSR-300HP
Open in ThreatlineRecord JSON
CVSS
7.2High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.36%Chance of exploitation activity in the next 30 days, higher than 28% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version yet
Published28 Sep 2026Updated 30 Sep 2026CVE List

What fixes it

No source in this snapshot names a fixed version.

Description

BUFFALO Wi-Fi products handle some web form input improperly to assemble command line strings internally. An administrative user may send a crafted HTTP request and execute an arbitrary OS command.

Text from CVE List

Affected versions 2

  • WSR-300HPaffected: all versions before Ver.2.55CVE List
  • WEX-G300affected: all versions before Ver.1.71CVE List

References 2