Authenticated code execution via unchecked curTime copy
Published Mar 15, 2026 · Updated Mar 15, 2026
Stack-based buffer overflow in D-Link DIR-619L 2.06B01 allows remote authenticated users to crash the router via a crafted request. The boa formSchedule handler copies the curTime POST parameter into a fixed-size local stack variable without checking its length, overwriting the saved return address. Access to the router's web management interface and valid credentials are required; the published proof of concept demonstrates a persistent service crash, while control-flow hijacking permits arbitrary code execution.
Summary
What happened
Stack-based buffer overflow in D-Link DIR-619L 2.06B01 allows remote authenticated users to crash the router via a crafted request. The boa formSchedule handler copies the curTime POST parameter into a fixed-size local stack variable without checking its length, overwriting the saved return address. Access to the router's web management interface and valid credentials are required; the published proof of concept demonstrates a persistent service crash, while control-flow hijacking permits arbitrary code execution.
The record
- CVE
- CVE-2026-4188
- Published
- Mar 15, 2026
- Updated
- Mar 15, 2026
- Vendor
- D-Link
- Product
- DIR-619L
- Classifications
- CWE-119, CWE-121, T1190, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 15, 2026CVE publishedPublication date reported by the CVE source.
- Mar 15, 2026Record 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=2.06B01
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-619L formSchedule curTime proof of conceptfunctional · demonstrated
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Technologies
Your stack
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Your stack
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