CVE-2025-8829Public exploitNetwork attack vector

Authenticated command execution via unsanitized hname

Published Aug 11, 2025 · Updated Aug 12, 2025

OS command injection in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 firmware allows remote authenticated users to execute commands. The um_red handler stores the unvalidated hname parameter through nvram_bufset, and internet.sh later extracts it into an operating-system command. A valid management session is required; successful injection can start a shell service and expose control of the extender.

CVSS severity8.8
High
EPSS probability8.26%
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 RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 firmware allows remote authenticated users to execute commands. The um_red handler stores the unvalidated hname parameter through nvram_bufset, and internet.sh later extracts it into an operating-system command. A valid management session is required; successful injection can start a shell service and expose control of the extender.

The record

CVE
CVE-2025-8829
Published
Aug 11, 2025
Updated
Aug 12, 2025
Vendor
Linksys
Product
RE6250
Classifications
CWE-78, CWE-77, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2025Record 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=20250801

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Linksys · RE6250version=20250801
Linksys · RE7000version=20250801
Linksys · RE9000version=20250801
Linksys · RE6300version=20250801
Linksys · RE6350version=20250801
Linksys · RE6500version=20250801

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
T1059Command and Scripting Interpreter

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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