Device denial of service via unchecked upload path
Published Dec 5, 2025 · Updated Jul 5, 2026
Buffer overflow in Fanvil X210 firmware 2.12.20 allows remote attackers to cause denial of service through a crafted upload POST request. The upload CGI handler accepts the upload/dest multipart parameter without checking its length, and a value of at least 704 characters triggers the overflow. No authentication or user interaction is required, and the public proof of concept demonstrates service interruption rather than command execution.
Summary
What happened
Buffer overflow in Fanvil X210 firmware 2.12.20 allows remote attackers to cause denial of service through a crafted upload POST request. The upload CGI handler accepts the upload/dest multipart parameter without checking its length, and a value of at least 704 characters triggers the overflow. No authentication or user interaction is required, and the public proof of concept demonstrates service interruption rather than command execution.
The record
- CVE
- CVE-2025-64053
- Published
- Dec 5, 2025
- Updated
- Jul 5, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-120, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 5, 2025CVE publishedPublication date reported by the CVE source.
- Jul 5, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- Fanvil X210 upload/dest denial-of-service proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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