Authenticated code execution via unchecked username copy
Published Jul 6, 2025 · Updated Jul 7, 2025
Stack-based buffer overflow in Belkin F9K1122 1.00.33 allows remote authenticated users to execute arbitrary code through PPTP setup. The webs component's formPPTPSetup handler copies the unbounded pptpUserName request value into a stack-local buffer, overwriting its return address. Low-privilege access to the browser-based management interface is required; a long value can crash the appliance or redirect execution.
Summary
What happened
Stack-based buffer overflow in Belkin F9K1122 1.00.33 allows remote authenticated users to execute arbitrary code through PPTP setup. The webs component's formPPTPSetup handler copies the unbounded pptpUserName request value into a stack-local buffer, overwriting its return address. Low-privilege access to the browser-based management interface is required; a long value can crash the appliance or redirect execution.
The record
- CVE
- CVE-2025-7086
- Published
- Jul 6, 2025
- Updated
- Jul 7, 2025
- Vendor
- Belkin
- Product
- Belkin F9K1122
- Classifications
- CWE-119, CWE-121, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 6, 2025CVE publishedPublication date reported by the CVE source.
- Jul 7, 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=1.00.33
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
- Belkin F9K1122 formPPTPSetup proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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