Authenticated arbitrary file overwrite via path traversal
Published May 12, 2022 · Updated Apr 15, 2025
Path traversal in InHand Networks InRouter302 3.5.4 allows remote authenticated users to upload or overwrite arbitrary writable files. upload.cgi_input appends the supplied filename to /tmp without rejecting traversal sequences, while an omitted type prevents upload.cgi_output from deleting the file. Access requires a valid web-interface login, and successful exploitation can replace any file writable by the httpd process.
Summary
What happened
Path traversal in InHand Networks InRouter302 3.5.4 allows remote authenticated users to upload or overwrite arbitrary writable files. upload.cgi_input appends the supplied filename to /tmp without rejecting traversal sequences, while an omitted type prevents upload.cgi_output from deleting the file. Access requires a valid web-interface login, and successful exploitation can replace any file writable by the httpd process.
The record
- CVE
- CVE-2022-21809
- Published
- May 12, 2022
- Updated
- Apr 15, 2025
- Vendor
- InHand Networks
- Product
- InRouter302
- Classifications
- CWE-377, CWE-434, T1105
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 12, 2022CVE publishedPublication date reported by the CVE source.
- Apr 15, 2025Record 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=V3.5.4
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
- Cisco Talos upload.cgi proof of conceptproof of concept · 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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