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10.0
CVE-2025-36939: OpenThread can be crashed by malicious network packets
CVE-2025-36939 · published 10 days ago
Summary
If someone with permission on your Thread network sends specially crafted messages, OpenThread may stop working, leading to a denial of service. The problem is caused by errors in how OpenThread processes certain network packets, which can trigger crashes. Update OpenThread to the latest version and restrict network access to trusted devices to protect your system.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| nest | 3.78.518349 |
Original advisory text
Multiple vulnerabilities exist in OpenThread's handling of MLE packets. An authenticated attacker on the same Thread network could send specially crafted packets to cause a denial of service. These...
Multiple vulnerabilities exist in OpenThread's handling of MLE packets. An authenticated attacker on the same Thread network could send specially crafted packets to cause a denial of service. These issues include triggerable assertion failures and a stack-based buffer overflow.
References
Severity
10.0
Critical
Exploitation
EPSS <1%
Type
CWE-121Stack-based Buffer Overflow
Timeline
Published24 Aug 2026
Updated26 Aug 2026
First seen24 Aug 2026
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