CVE-2026-2537
Published: 16 February 2026
Summary
CVE-2026-2537 is a medium-severity Injection (CWE-74) vulnerability in Comfast Cf-E4 Firmware. Its CVSS base score is 4.7 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 47.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Developer assessments and testing (including injection-focused techniques) identify improper neutralization of special elements, and the verifiable flaw remediation corrects them pre-deployment.
Identifies indicators of injection attacks (command, SQL, LDAP, etc.) via anomaly and attack monitoring.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Command injection in exposed web CGI handler directly enables T1190 (public-facing app exploitation) and T1059.004 (Unix shell command execution on embedded Linux firmware).
NVD Description
A vulnerability was identified in Comfast CF-E4 2.6.0.1. This impacts an unknown function of the file /cgi-bin/mbox-config?method=SET§ion=ntp_timezone of the component HTTP POST Request Handler. Such manipulation of the argument timestr leads to command injection. The attack may be launched remotely.…
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The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Deeper analysisAI
CVE-2026-2537 is a command injection vulnerability affecting the Comfast CF-E4 firmware version 2.6.0.1. It impacts an unknown function within the file /cgi-bin/mbox-config?method=SET§ion=ntp_timezone of the HTTP POST Request Handler component. Manipulation of the timestr argument enables command injection, as classified under CWE-74 and CWE-77.
The vulnerability allows remote exploitation over the network with low attack complexity but requires high privileges (PR:H) and no user interaction. Attackers with privileged access can achieve low-level impacts on confidentiality, integrity, and availability (CVSS 4.7; CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L), potentially leading to remote code execution.
Advisories from VulDB document the issue, and a public exploit is available on GitHub at https://github.com/cha0yang1/COMFAST/blob/main/RCE.md. The vendor was contacted early for disclosure but provided no response, leaving no official patches or mitigation guidance.
The exploit is publicly available and might be used in attacks, with no further details on real-world exploitation.
Details
- CWE(s)