CVE-2026-86509

D-Link DIR-895L udhcpcd serverpacket.c sendACK stack-based overflow

State: Published
Severity: 9.4 Critical
Published: Sep 8, 2026
Updated: Sep 11, 2026
Reserved: Sep 7, 2026

Description

A flaw has been found in D-Link DIR-895L A1_102b07. This impacts the function sendOffer/sendACK of the file udhcpcd/serverpacket.c of the component udhcpcd. This manipulation causes stack-based buffer overflow. The attack can only be done within the local network. The exploit has been published and may be used.

Scores

CVSS	Score	Vector	Source
4.0	9.4 Critical	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P	VulDB
3.1	9.6 Critical	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
3.0	9.6 Critical	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
2.0	8.3 High	AV:A/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR	VulDB

Weaknesses

CWE-121 Stack-based Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
DIR-895LD-Link	A1_102b07Affected

References

VDB-399662 | D-Link DIR-895L udhcpcd serverpacket.c sendACK stack-based overflowvdb-entrytechnical-description
VDB-399662 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2026-86509 | CVE Analysis and Reportthird-party-advisory
Submit #906298 | D-Link DIR895LA1_102b07 A1_102b07 Stack-based Buffer Overflowthird-party-advisory
https://tzh00203.notion.site/D-Link-DIR-895L-Stack-Overflow-in-udhcpd-TR-111-Option-125-Parsing-33cb5c52018a80dc8140e1502e4814d0exploit
https://www.dlink.com/product

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