Memory corruption via unchecked POST path concatenation
Published Jun 17, 2025 · Updated Jun 17, 2025
Stack-based buffer overflow in the D-Link DIR-665 1.00 HTTP POST handler allows remote authenticated users to corrupt memory via a crafted request. In sub_AC78, strcat appends the requested path while constructing a www-directory filename without checking the 34-byte destination buffer. Low-privilege access to the router's HTTP service is required, and the public artifact does not demonstrate control-flow hijacking.
Summary
What happened
Stack-based buffer overflow in the D-Link DIR-665 1.00 HTTP POST handler allows remote authenticated users to corrupt memory via a crafted request. In sub_AC78, strcat appends the requested path while constructing a www-directory filename without checking the 34-byte destination buffer. Low-privilege access to the router's HTTP service is required, and the public artifact does not demonstrate control-flow hijacking.
The record
- CVE
- CVE-2025-6158
- Published
- Jun 17, 2025
- Updated
- Jun 17, 2025
- Vendor
- D-Link
- Product
- D-Link DIR-665
- Classifications
- CWE-121, CWE-119, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 17, 2025CVE publishedPublication date reported by the CVE source.
- Jun 17, 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?
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- Affected versionversion=1.00
What conditions does exploitation require?
What is affected?
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
- DIR-665 crafted POST request proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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