Authenticated memory corruption via unchecked password copy
Published Jul 13, 2025 · Updated Jul 15, 2025
Stack-based buffer overflow in Tenda FH1202 1.2.0.14(408) allows remote authenticated users to corrupt memory via a crafted WAN request. The fromAdvSetWan handler passes the POST-supplied PPPOEPassword value to decodePwd, which copies it into a fixed-size stack array without enforcing its capacity. Low-privileged access to the management endpoint is required, and public evidence demonstrates a proof-of-concept request rather than exploitation in the wild.
Summary
What happened
Stack-based buffer overflow in Tenda FH1202 1.2.0.14(408) allows remote authenticated users to corrupt memory via a crafted WAN request. The fromAdvSetWan handler passes the POST-supplied PPPOEPassword value to decodePwd, which copies it into a fixed-size stack array without enforcing its capacity. Low-privileged access to the management endpoint is required, and public evidence demonstrates a proof-of-concept request rather than exploitation in the wild.
The record
- CVE
- CVE-2025-7527
- Published
- Jul 13, 2025
- Updated
- Jul 15, 2025
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- FH1202
- Classifications
- CWE-121, CWE-119
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 13, 2025CVE publishedPublication date reported by the CVE source.
- Jul 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=1.2.0.14(408)
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
- fromAdvSetWan oversized PPPOEPassword proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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