Cyber Posture

CVE-2025-29229

Critical

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 56.3th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Description

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

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.

Security SummaryAI

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

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

References