E2500 Firmware
CVE-2025-44654
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK
1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Jul 05, 2026
Improper access control in the Linksys E2500 wireless router (firmware 3.0.04.002) stems from its bundled vsftpd FTP service, where the reporter flags the chroot_local_user setting as enabling unauthorized reach into system files, privilege escalation, or lateral pivoting into the internal network. The E2500 is a discontinued consumer/SOHO router, and no public exploit identified at time of analysis; EPSS estimates only a 1.08% exploitation probability (61st percentile). Notably, the single reference is a third-party GitHub gist rather than a vendor advisory, and the technical claim is internally inconsistent (see risk assessment).
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (mitre) · only source for this CVE.
CVSS VectorVendor: mitre
DescriptionCVE.org
In Linksys E2500 3.0.04.002, the chroot_local_user option is enabled in the vsftpd configuration file. This could lead to unauthorized access to system files, privilege escalation, or use of the compromised server as a pivot point for internal network attacks.
Executive ViewAI
The Linksys E2500 router (firmware 3.0.04.002) contains a critical improper access control vulnerability in its bundled FTP service that could allow unauthorized file access and privilege escalation, with no public exploit identified at time of analysis. While the CVSS score is 9.8, real-world organizational risk is significantly lower due to the product's discontinued status, minimal active deployment, and very low exploitation probability (EPSS 1.1%). Organizations should prioritize inventory and remediation only if these routers remain in active use.
Within 24 hours: Scan network for active Linksys E2500 routers and document inventory. Within 7 days: Disable FTP service on all affected routers via management console or disable remote access entirely; isolate routers on restricted network segments. Within 30 days: Replace all E2500 routers with current-generation hardware and decommission deprecated units from the network.
No vendor-released patch identified at time of analysis. Interim mitigations: (1) Disable FTP service via router web interface or disable remote management access; (2) Implement network segmentation to restrict lateral movement from router; (3) Monitor FTP logs and network traffic to/from router for suspicious activity; (4) Restrict administrative access to router management interface to trusted networks only; (5) Accelerate replacement with current hardware.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.
Affected Products (CPE)CVE.org
More in E2500 Firmware
View allDevices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version
A vulnerability was discovered in Linksys Router E2500 with firmware 2.0.00, allows authenticated attackers to execute a
An exploitable operating system command injection exists in the Linksys ESeries line of routers (Linksys E1200 Firmware
Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version
Exploit-DB