Authenticated router crash via unchecked submit-url copy
Published Dec 29, 2025 · Updated Dec 29, 2025
Buffer overflow in D-Link DWR-M920 1.1.50 and earlier allows remote authenticated users to crash the router via a crafted submit-url. The sub_464794 handler passes the request parameter to strcpy without checking its length, overflowing the w_guide_htm_ buffer. A valid web-management session is required; the published proof of concept demonstrates a service crash, while code execution is not established.
Summary
What happened
Buffer overflow in D-Link DWR-M920 1.1.50 and earlier allows remote authenticated users to crash the router via a crafted submit-url. The sub_464794 handler passes the request parameter to strcpy without checking its length, overflowing the w_guide_htm_ buffer. A valid web-management session is required; the published proof of concept demonstrates a service crash, while code execution is not established.
The record
- CVE
- CVE-2025-15189
- Published
- Dec 29, 2025
- Updated
- Dec 29, 2025
- Vendor
- D-Link
- Product
- DWR-M920
- Classifications
- CWE-120, CWE-119, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 29, 2025CVE publishedPublication date reported by the CVE source.
- Dec 29, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.1.0
- Affected versionversion=1.1.1
- Affected versionversion=1.1.10
- Affected versionversion=1.1.11
- Affected versionversion=1.1.12
- Affected versionversion=1.1.13
- Affected versionversion=1.1.14
- Affected versionversion=1.1.15
- Affected versionversion=1.1.16
- Affected versionversion=1.1.17
- Affected versionversion=1.1.18
- Affected versionversion=1.1.19
- Affected versionversion=1.1.2
- Affected versionversion=1.1.20
- Affected versionversion=1.1.21
- Affected versionversion=1.1.22
- Affected versionversion=1.1.23
- Affected versionversion=1.1.24
- Affected versionversion=1.1.25
- Affected versionversion=1.1.26
- Affected versionversion=1.1.27
- Affected versionversion=1.1.28
- Affected versionversion=1.1.29
- Affected versionversion=1.1.3
- Affected versionversion=1.1.30
- Affected versionversion=1.1.31
- Affected versionversion=1.1.32
- Affected versionversion=1.1.33
- Affected versionversion=1.1.34
- Affected versionversion=1.1.35
- Affected versionversion=1.1.36
- Affected versionversion=1.1.37
- Affected versionversion=1.1.38
- Affected versionversion=1.1.39
- Affected versionversion=1.1.4
- Affected versionversion=1.1.40
- Affected versionversion=1.1.41
- Affected versionversion=1.1.42
- Affected versionversion=1.1.43
- Affected versionversion=1.1.44
- Affected versionversion=1.1.45
- Affected versionversion=1.1.46
- Affected versionversion=1.1.47
- Affected versionversion=1.1.48
- Affected versionversion=1.1.49
- Affected versionversion=1.1.5
- Affected versionversion=1.1.50
- Affected versionversion=1.1.6
- Affected versionversion=1.1.7
- Affected versionversion=1.1.8
- Affected versionversion=1.1.9
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
- DWR-M920 formDefRoute proof of conceptfunctional · 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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