CRITICALCVSS v3.1 9.8Vulnerability
CVE-2026-119756
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.
Properties
- Epss score
- 0.00488
- First seen
- 2026-11-09T18:32:00+00:00
- Cvss score
- 9.8
- Last seen
- 2026-11-09T18:32:00+00:00
- Euvd assigner
- VulnCheck
- Retrieved at
- 2026-11-10T23:35:17+00:00
- Src batch id
- euvd-20261109T193401Z-b5403a
- Source url
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-120125
- Score
- 9.8
- Euvd base score version
- 4.0
- Fetched at
- 2026-11-09T19:34:20+00:00
- Euvd vendor
- arendst
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- First seen by Signal
- 2026-11-09T19:15:57+00:00
- Euvd base score
- 9.3
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Content hash
- d7e135f9a687ca7c6fd7a9486b97d1b55a632e3ffe7fd06e3339bae8f61128a9
- Published at
- 2026-11-09T18:17:22.320
- Euvd updated
- 2026-11-09T18:32:00+00:00
- Last modified
- 2026-11-09T23:17:13.907
Related Entities (1)
HAS_WEAKNESS (1)
Related research
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