A stack-based buffer overflow vulnerability exists in the TDDPv2 service (/usr/bin/tddp) on Deco M9 Plus due to insufficient validation of decrypted request data length before it is copied into a fixed-size stack buffer in the subtype 0x91 handler. Successful exploitation may allow an adjacent, unauthenticated attacker to cause a denial of service or achieve arbitrary code execution during the device setup phase through crafted TDDP packets.
History

Thu, 01 Oct 2026 20:00:00 +0000

Type Values Removed Values Added
First Time appeared Tp-link
Tp-link deco M9 Plus V2
Vendors & Products Tp-link
Tp-link deco M9 Plus V2

Thu, 01 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 01 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Description A stack-based buffer overflow vulnerability exists in the TDDPv2 service (/usr/bin/tddp) on Deco M9 Plus due to insufficient validation of decrypted request data length before it is copied into a fixed-size stack buffer in the subtype 0x91 handler. Successful exploitation may allow an adjacent, unauthenticated attacker to cause a denial of service or achieve arbitrary code execution during the device setup phase through crafted TDDP packets.
Title Pre-Authentication Stack-based Buffer Overflow Remote Code Execution in TDDPv2 Subtype 0x91 on Deco M9 Plus
Weaknesses CWE-121
References
Metrics cvssV4_0

{'score': 7.7, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: TPLink

Published: 2026-10-01T18:16:32.107Z

Updated: 2026-10-01T18:36:18.919Z

Reserved: 2026-05-14T18:04:17.050Z

Link: CVE-2026-8618

cve-icon Vulnrichment

Updated: 2026-10-01T18:36:05.547Z

cve-icon NVD

Status : Deferred

Published: 2026-10-01T19:17:25.340

Modified: 2026-10-01T20:36:38.330

Link: CVE-2026-8618

cve-icon Redhat

No data.