CVE-2026-86299Public exploitNetwork attack vector

Root command execution via unsanitized PingTest parameters

Published Sep 7, 2026 · Updated Sep 7, 2026

OS command injection in Linksys RE7000 2.0.15 allows remote authenticated users to execute arbitrary commands as root via PingTest requests. The platform_event_pingTest function concatenates pingTestIp, pingTestPktSize, and pingTestTimes into a ping command and passes it to system() without shell-metacharacter filtering. A valid or predictable session cookie reaches the handler, after which injected commands run with root privileges.

CVSS severity9.9
Critical
EPSS probability1.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Linksys RE7000 2.0.15 allows remote authenticated users to execute arbitrary commands as root via PingTest requests. The platform_event_pingTest function concatenates pingTestIp, pingTestPktSize, and pingTestTimes into a ping command and passes it to system() without shell-metacharacter filtering. A valid or predictable session cookie reaches the handler, after which injected commands run with root privileges.

The record

CVE
CVE-2026-86299
Published
Sep 7, 2026
Updated
Sep 7, 2026
Vendor
Linksys
Product
RE7000
Classifications
CWE-78, CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Linksys · RE7000version=2.0.15

Published CVSS scores

9.0VulDB CNAAV:N/AC:L/Au:S/C:C/I:C/A:C
9.4VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
9.9VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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