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TI-2026-59213 Aliases CVE-2026-86530GHSA-j628-7w6r-937x

OS command injection in BUFFALO INC. WSR-300HP

Priority LOW 39CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0036 30th percentileScored 2026-11-07
Fix Fixed WSR-300HP (BUFFALO INC.): Ver.2.55WEX-G300 (BUFFALO INC.): Ver.1.71

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
BUFFALO INC.WSR-300HPbefore Ver.2.55Ver.2.55Patch availableCNA
BUFFALO INC.WEX-G300before Ver.1.71Ver.1.71Patch availableCNA
  • WSR-300HP VendorBUFFALO INC. Affected before Ver.2.55 Fixed in Ver.2.55 Patch available CNA
  • WEX-G300 VendorBUFFALO INC. Affected before Ver.1.71 Fixed in Ver.1.71 Patch available CNA

Remediation

  • Fix · CNA WSR-300HP (BUFFALO INC.) Fixed in Ver.2.55
  • Fix · CNA WEX-G300 (BUFFALO INC.) Fixed in Ver.1.71

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    BUFFALO WEX-G300, WSR-300HP Ver.1.71, Ver.2.55

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-63498 Stack-based buffer overflow in BUFFALO INC. WSR-300HPPriority MEDIUM 44
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86530
  2. 2026-10-03 Alias added: GHSA-j628-7w6r-937x

References

Other 2

  • TI-2021-03393 Path traversal in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3 KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-27920 An issue in Buffalo LS210D v.1.78-0.03 allows a remote attacker to execute arbitrary code… CVSS 3.1HIGH 8.1
  • TI-2023-20705 An Issue in Buffalo America, Inc. CVSS 3.1HIGH 7.5
  • TI-2023-26723 Command injection in the ping utility on Buffalo LS210D 1.78-0.03 allows a remote… CVSS 3.1HIGH 7.2
  • TI-2018-09572 Incorrect access control in nasapi in Buffalo TS5600D1206 version 3.61-0.10 allows… CVSS 3.0CRITICAL 9.8
  • TI-2024-15530 Plaintext storage of a password issue exists in BUFFALO wireless LAN routers, which may… CVSS 3.1CRITICAL 9.8
See all 74 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences