What is the CVSS score of CVE-2026-2550?

CVE-2026-2550 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of EFM are affected by CVE-2026-2550?

A critical vulnerability (CVSS 9.8) in EFM iptime A6004MX router firmware allows unauthenticated remote attackers to execute arbitrary code through the VPN client file upload function.

How to fix or mitigate CVE-2026-2550?

Within 24 hours: Identify all EFM iptime A6004MX devices in your environment and assess their exposure to untrusted networks. Within 7 days: Implement network segmentation to isolate affected devices or disable remote access to the vulnerable /cgi/timepro.cgi endpoint using firewall rules. Within 30 days: Plan device replacement or firmware upgrade as soon as vendor patch becomes available; evaluate alternative router solutions if patching timeline is unclear.

EFM CVE-2026-2550

CRITICAL

Improper Access Control (CWE-284)

2026-02-16 cna@vuldb.com

File Upload Authentication Bypass

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Feb 16, 2026 - 10:16 nvd

CRITICAL 9.8

DescriptionCVE.org

A vulnerability was found in EFM iptime A6004MX 14.18.2. Affected is the function commit_vpncli_file_upload of the file /cgi/timepro.cgi. The manipulation results in unrestricted upload. The attack may be performed from remote. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.