CVE-2026-8618

UNKNOWN 0.0

Pre-Authentication Stack-based Buffer Overflow Remote Code Execution in TDDPv2 Subtype 0x91 on Deco M9 Plus

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121
Vendor	tp-link systems inc.
Product	deco m9 plus v2
Published	Oct 1, 2026
Last Updated	Oct 1, 2026

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Affected Versions

TP-Link Systems Inc. / Deco M9 Plus V2

0 < 1.9.2 Build 20260818

References

NVD ↗ CVE.org ↗ EPSS Data ↗

tp-link.com: https://www.tp-link.com/en/support/download/deco-m9-plus/v2/#Firmware tp-link.com: https://www.tp-link.com/us/support/download/deco-m9-plus/v2/#Firmware tp-link.com: https://www.tp-link.com/us/support/faq/5322/

Credits

Isa Roovers