Cyber Posture

CVE-2025-29229

CriticalRCE

Published: 23 December 2025

Published
23 December 2025
Modified
06 January 2026
KEV Added
—
Patch
—
CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0034 56.4th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-29229 is a critical-severity Command Injection (CWE-77) vulnerability in Linksys E5600 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 43.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 AC-14 (Permitted Actions Without Identification or Authentication) and SI-10 (Information Input Validation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.
Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match
prevent

Directly prevents command injection by validating and sanitizing untrusted inputs to the vulnerable ddnsStatus function.

SI-2 Flaw Remediation good match
prevent

Remediates the specific command injection flaw in Linksys E5600 firmware V1.1.0.26 through timely flaw correction and patching.

AC-14 Permitted Actions Without Identification or Authentication good match
prevent

Limits unauthenticated access to the vulnerable ddnsStatus function, blocking remote exploitation requiring no privileges.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.008 Network Device CLI Execution
Adversaries may abuse scripting or built-in command line interpreters (CLI) on network devices to execute malicious command and payloads.
attack.mitre.org →
Why these techniques?

Unauthenticated remote command injection in public-facing router firmware directly enables exploitation of public-facing application (T1190) and command execution on network device (T1059.008).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

NVD Description

linksys E5600 V1.1.0.26 is vulnerable to command injection in the function ddnsStatus.

Deeper analysisAI

CVE-2025-29229 is a command injection vulnerability (CWE-77) in the ddnsStatus function of the Linksys E5600 router firmware version V1.1.0.26. Published on 2025-12-23, it carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), classifying it as critical due to its potential for severe impact.

The vulnerability enables remote exploitation over the network with low attack complexity, requiring no authentication, privileges, or user interaction. An unauthenticated attacker can inject and execute arbitrary commands on the affected device, achieving high confidentiality, integrity, and availability impacts.

Mitigation details are available in the referenced advisory at https://github.com/JZP018/Vuln/blob/main/linsys/E5600/CI_ddnsStatus/CI_ddnsStatus.md.

Details

CWE(s)
CWE-77

Affected Products

linksys
e5600 firmware
1.1.0.26

CVEs Like This One

CVE-2025-29228Same product: Linksys E5600
CVE-2025-29230Same product: Linksys E5600
CVE-2024-57223Same vendor: Linksys
CVE-2024-57227Same vendor: Linksys
CVE-2024-57226Same vendor: Linksys
CVE-2024-57536Same vendor: Linksys
CVE-2025-9146Same product: Linksys E5600
CVE-2024-57228Same vendor: Linksys
CVE-2024-57224Same vendor: Linksys
CVE-2024-57225Same vendor: Linksys

References