Device crashes via malformed MLE packet handling
Published Aug 24, 2026 · Updated Aug 24, 2026
Denial of service in OpenThread MLE handling in Google Nest 3.78.518349 allows remote authenticated users to crash devices with crafted packets. OpenThread's MLE packet-handling path processes the crafted packets until assertions fire or a stack buffer overflows instead of rejecting them. An attacker must already be authenticated to the same Thread network; the documented consequence is device service interruption.
Summary
What happened
Denial of service in OpenThread MLE handling in Google Nest 3.78.518349 allows remote authenticated users to crash devices with crafted packets. OpenThread's MLE packet-handling path processes the crafted packets until assertions fire or a stack buffer overflows instead of rejecting them. An attacker must already be authenticated to the same Thread network; the documented consequence is device service interruption.
The record
- CVE
- CVE-2025-36939
- Published
- Aug 24, 2026
- Updated
- Aug 24, 2026
- Vendor
- Google Cloud
- Product
- Nest
- Classifications
- CWE-121, T1499
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 24, 2026CVE publishedPublication date reported by the CVE source.
- Aug 24, 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?
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- Affected versionversion=3.78.518349
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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