OS Command Injection in Linksys RE7000 by Linksys
CVE-2026-86299

9.4CRITICAL

Key Information:

Vendor

Linksys
Status
Re7000
Vendor
CVE Published:
7 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-86299?

A vulnerability in the Linksys RE7000 version 2.0.15 allows for OS command injection through the PingTest Handler. Specifically, the manipulation of the pingTestIp, pingTestPktSize, and pingTestTimes parameters in the /cgi-bin/json.cgi?PingTest endpoint can enable an attacker to execute arbitrary commands on the device. This vulnerability can be exploited remotely, posing a significant risk to the integrity and security of the network. The exploit is publicly available, making it essential for users to take immediate action to secure their devices.

Affected Version(s)

RE7000 2.0.15

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-86299 - Proof of Concept

References

https://vuldb.com/vuln/399463
vdb-entrytechnical-description
https://vuldb.com/vuln/399463/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86299
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

sleep (VulDB User)
.