CVE-2026-86530

Administrative Privilege Exploit Enables OS Command Execution via Web Form Input

Published Sep 28, 2026 CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Buffalo
Buffalo wex-g300
Buffalo wsr-300hp
Vendors & Products Buffalo
Buffalo wex-g300
Buffalo wsr-300hp
Type Values Removed Values Added
Title Administrative Privilege Exploit Enables OS Command Execution via Web Form Input
Type Values Removed Values Added
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.
Weaknesses CWE-78
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
jpcert
Published
Updated
Sep 30, 2026, 12:33 PM
Reserved
Sep 24, 2026, 8:54 AM
Status
Awaiting Analysis
Published
Sep 28, 2026, 9:17 AM
Modified
Sep 30, 2026, 1:17 PM