Authenticated command execution via unvalidated bandwidth
Published Feb 16, 2026 · Updated Feb 16, 2026
Command injection in COMFAST CF-N1 V2 2.6.0.2 allows remote authenticated users to execute arbitrary commands via an HTTP request. In the webmggnt component, sub_44AC4C passes the unvalidated bandwidth field through sprintf into a command string and executes it with system. A valid login session cookie is required, and successful exploitation executes attacker-supplied commands with the web-management process's device privileges.
Summary
What happened
Command injection in COMFAST CF-N1 V2 2.6.0.2 allows remote authenticated users to execute arbitrary commands via an HTTP request. In the webmggnt component, sub_44AC4C passes the unvalidated bandwidth field through sprintf into a command string and executes it with system. A valid login session cookie is required, and successful exploitation executes attacker-supplied commands with the web-management process's device privileges.
The record
- CVE
- CVE-2026-2534
- Published
- Feb 16, 2026
- Updated
- Feb 16, 2026
- Vendor
- COMFAST
- Product
- CF-N1 V2
- Classifications
- CWE-74, CWE-77, T1059.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 16, 2026CVE publishedPublication date reported by the CVE source.
- Feb 16, 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.
- Affected versionversion=2.6.0.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- Comfast CF-N1 Router bandwidth command-injection proof of conceptproof of concept · unverified
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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