Authenticated root command execution via unsanitized destination
Published Jun 21, 2026 · Updated Jun 21, 2026
OS command injection in COMFAST CF-WR631AX V3 2.7.0.0 through 2.7.0.8 allows remote authenticated users to execute commands as root. The ping_config handler in /usr/bin/webmgnt inserts the destination JSON string into a double-quoted /bin/ping command with sprintf and passes it to system without escaping. A valid COMFAST_SESSIONID is required; injected shell metacharacters can start services or return command output with root privileges.
Summary
What happened
OS command injection in COMFAST CF-WR631AX V3 2.7.0.0 through 2.7.0.8 allows remote authenticated users to execute commands as root. The ping_config handler in /usr/bin/webmgnt inserts the destination JSON string into a double-quoted /bin/ping command with sprintf and passes it to system without escaping. A valid COMFAST_SESSIONID is required; injected shell metacharacters can start services or return command output with root privileges.
The record
- CVE
- CVE-2026-12814
- Published
- Jun 21, 2026
- Updated
- Jun 21, 2026
- Vendor
- COMFAST
- Product
- CF-WR631AX V3
- Classifications
- CWE-78, CWE-77, T1059.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 21, 2026CVE publishedPublication date reported by the CVE source.
- Jun 21, 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=2.7.0.0
- Affected versionversion=2.7.0.1
- Affected versionversion=2.7.0.2
- Affected versionversion=2.7.0.3
- Affected versionversion=2.7.0.4
- Affected versionversion=2.7.0.5
- Affected versionversion=2.7.0.6
- Affected versionversion=2.7.0.7
- Affected versionversion=2.7.0.8
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-WR631AX Router Backend Command Injection RCE Analysis and PoCfunctional · demonstrated
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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