CVE-2026-2823Public exploitNetwork attack vector

Authenticated command execution via unvalidated timestr

Published Feb 20, 2026 · Updated Feb 20, 2026

Command injection in COMFAST CF-E7 2.6.0.9 allows remote authenticated users to execute arbitrary commands through an HTTP POST request. In webmggnt function sub_41ACCC, the timestr value is accepted without validation, inserted into a command with sprintf, and passed to system. A valid COMFAST session and disabled NTP are required; successful exploitation runs attacker-chosen shell commands on the router.

CVSS severity6.3
Medium
EPSS probability16.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in COMFAST CF-E7 2.6.0.9 allows remote authenticated users to execute arbitrary commands through an HTTP POST request. In webmggnt function sub_41ACCC, the timestr value is accepted without validation, inserted into a command with sprintf, and passed to system. A valid COMFAST session and disabled NTP are required; successful exploitation runs attacker-chosen shell commands on the router.

The record

CVE
CVE-2026-2823
Published
Feb 20, 2026
Updated
Feb 20, 2026
Vendor
COMFAST
Product
CF-E7
Classifications
CWE-77, CWE-74, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.0.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

COMFAST · CF-E7version=2.6.0.9

Published CVSS scores

2.1VulDBCVSS: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
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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