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CVE-2026-86530

Quick assessment

Affected
BUFFALO INC. WSR-300HP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Buffalo Wi-Fi 产品在处理某些 Web 表单输入时存在缺陷，会将其错误地用于内部组装命令行字符串。攻击者只要以管理员身份发送精心构造的 HTTP 请求，即可执行任意操作系统命令。

CVSS 7.2 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-86530

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
BUFFALO INC. WSR-300HP 0 ~ Ver.2.55 -
BUFFALO INC. WEX-G300 0 ~ Ver.1.71 -

II. Public POCs for CVE-2026-86530

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-86530

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Vendor Advisories for CVE-2026-86530 (1)

Other References for CVE-2026-86530 (1)

IV. Related Vulnerabilities

Same product: WSR-300HP
Same vendor: BUFFALO INC.
Same weakness: CWE-78

V. Comments for CVE-2026-86530

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