Authenticated memory corruption via unbounded sprintf
Published Jul 26, 2025 · Updated Jul 28, 2025
Stack-based buffer overflow in D-Link DIR-513 firmware 1.0 through 1.10 allows remote authenticated users to corrupt memory via HTTP. The Boa formSetWanL2TPcallback handler uses sprintf to copy an attacker-controlled value into a fixed-size stack buffer without a length bound. A low-privilege web-management session and a crafted POST request are required; exploitation can crash the router or execute code on it.
Summary
What happened
Stack-based buffer overflow in D-Link DIR-513 firmware 1.0 through 1.10 allows remote authenticated users to corrupt memory via HTTP. The Boa formSetWanL2TPcallback handler uses sprintf to copy an attacker-controlled value into a fixed-size stack buffer without a length bound. A low-privilege web-management session and a crafted POST request are required; exploitation can crash the router or execute code on it.
The record
- CVE
- CVE-2025-8184
- Published
- Jul 26, 2025
- Updated
- Jul 28, 2025
- Vendor
- D-Link
- Product
- DIR-513
- Classifications
- CWE-121, CWE-787, CWE-119, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 26, 2025CVE publishedPublication date reported by the CVE source.
- Jul 28, 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=1.0
- Affected versionversion=1.1
- Affected versionversion=1.10
- Affected versionversion=1.2
- Affected versionversion=1.3
- Affected versionversion=1.4
- Affected versionversion=1.5
- Affected versionversion=1.6
- Affected versionversion=1.7
- Affected versionversion=1.8
- Affected versionversion=1.9
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
- DIR-513 formSetWanL2TP crafted POST proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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