CVE-2026-2823 - Vulnerability Details

- Comfast CF-E7 webmggnt mbox-config sub_41ACCC command injection

Description

A vulnerability was detected in Comfast CF-E7 2.6.0.9. The impacted element is the function sub_41ACCC of the file /cgi-bin/mbox-config?method=SET&section=ntp_timezone of the component webmggnt. Performing a manipulation of the argument timestr results in command injection. The attack is possible to be carried out remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Published: 2026-02-20

Score: 5.3 Medium

EPSS: 16.8% Moderate

KEV: No

Impact:

Action:

Analysis

Impact

A command injection flaw exists within the /cgi-bin/mbox-config endpoint of Comfast CF‑E7 routers. By manipulating the timestr parameter, an attacker can embed arbitrary shell commands that are passed directly to the device’s operating system, enabling full control of the router. This vulnerability is classified as an OS command injection weakness.

Affected Systems

Only Comfast CF‑E7 routers running firmware version 2.6.0.9 are confirmed to be vulnerable; no other firmware releases are listed as affected.

Risk and Exploitability

The CVSS base score of 5.3 marks the issue as medium severity, while the EPSS score of 17% indicates a fairly high likelihood of exploitation in the wild. The flaw can be triggered remotely through the publicly reachable web interface and is currently not noted in CISA’s KEV catalog. An attacker can send a crafted HTTP request to the /cgi-bin/mbox-config?method=SET&section=ntp_timezone endpoint and achieve arbitrary command execution without authentication.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Comfast

CF-E7

affected

Version	Status	Constraints
`2.6.0.9`	affected	—

Configuration 1 [-]

AND

cpe:2.3:o:comfast:cf-e7_firmware:2.6.0.9:*:*:*:*:*:*:*

cpe:2.3:h:comfast:cf-e7:-:*:*:*:*:*:*:*

No data.

Vendor Product Confidence Versions

Comfast

Cf-e7

100%

Version	Status	Scheme	Platform
`2.6.0.9`	affected	generic	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Update the firmware to a version provided by the vendor that addresses this command injection flaw.
Restrict access to the router’s web management interface so only trusted internal or VPN addresses can reach the /cgi-bin/mbox-config endpoint.
If the endpoint is not required, disable it or enforce strict input validation that rejects non‑numeric or excessively long timestr values.
Enable detailed HTTP logging and implement monitoring or alerting for repeated injection attempts, applying rate‑limiting or blocking after repeated failures.

Generated by OpenCVE AI on August 5, 2026 at 03:36 UTC.

Tracking

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Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.16791.

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/jinhao118/cve/blob/main/ComFast%20Router_3.md
https://vuldb.com/?ctiid.346948
https://vuldb.com/?id.346948
https://vuldb.com/?submit.753871

History

Mon, 23 Feb 2026 10:45:00 +0000

Type	Values Removed	Values Added
CPEs		cpe:2.3:o:comfast:cf-e7_firmware::::::::

Fri, 20 Feb 2026 19:00:00 +0000

Type	Values Removed	Values Added
First Time appeared		Comfast cf-e7 Firmware
CPEs		cpe:2.3:h:comfast:cf-e7:-:::::::* cpe:2.3:o:comfast:cf-e7_firmware:2.6.0.9:::::::*
Vendors & Products		Comfast cf-e7 Firmware

Fri, 20 Feb 2026 16:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Fri, 20 Feb 2026 10:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Comfast Comfast cf-e7
Vendors & Products		Comfast Comfast cf-e7

Fri, 20 Feb 2026 05:15:00 +0000

Type	Values Removed	Values Added
Description		A vulnerability was detected in Comfast CF-E7 2.6.0.9. The impacted element is the function sub_41ACCC of the file /cgi-bin/mbox-config?method=SET&section=ntp_timezone of the component webmggnt. Performing a manipulation of the argument timestr results in command injection. The attack is possible to be carried out remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Title		Comfast CF-E7 webmggnt mbox-config sub_41ACCC command injection
Weaknesses		CWE-74 CWE-77
References		https://github.com/jinhao118/cve/blob/main/ComFast%20Router_3.md https://vuldb.com/?ctiid.346948 https://vuldb.com/?id.346948 https://vuldb.com/?submit.753871
Metrics		cvssV2_0 `{'score': 6.5, 'vector': 'AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}` cvssV3_0 `{'score': 6.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}` cvssV3_1 `{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}` cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}`

Subscriptions

Comfast Cf-e7 Cf-e7 Firmware

MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-02-20T05:02:06.940Z

Updated: 2026-02-23T10:30:48.632Z

Reserved: 2026-02-19T17:22:19.708Z

Link: CVE-2026-2823

Vulnrichment

Updated: 2026-02-20T14:53:10.252Z

NVD

Status : Analyzed

Published: 2026-02-20T05:17:53.923

Modified: 2026-06-17T10:31:50.297

Link: CVE-2026-2823

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-08-05T03:45:03Z

Weaknesses

CWE-74
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-77
Improper Neutralization of Special Elements used in a Command ('Command Injection')

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

Exploitation poc

Automatable no

Technical Impact partial

Subscriptions

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