CRITICAL 9.3 NVD
CVE-2026-119756
Tasmota through 16.0.0, fixed in commit e97e1e4, contains a heap out-of-bounds write vulnerability in SendReceiveDeviceGroupMessage() that allows unauthenticate
Tasmota through 16.0.0, fixed in commit e97e1e4, contains a heap out-of-bounds write vulnerability in SendReceiveDeviceGroupMessage() that allows unauthenticated attackers on the local network to corrupt heap memory by sending crafted Device Groups messages over UDP port 4447 that cause the log_remaining counter to go negative and writes to exceed the fixed 512-byte buffer. Attackers can exploit this flaw to crash the device or potentially achieve native code execution on ESP8266 and ESP32 platforms that lack ASLR and heap cookies.
References
- https://github.com/arendst/Tasmota/commit/e97e1e4f7e319a55caa1613aef1f25fc81bdb554
- https://www.vulncheck.com/advisories/tasmota-heap-out-of-bounds-write-via-device-groups-ud
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-11-09 via NVD.
Risk Timeline
CVE Disclosed2026-11-09 · 0 days ago
Remediation Resources
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