CVE-2026-86509

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

9.4 Critical

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.

Attack profile

How easy it is to exploit

Attack vector: Adjacent network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.72%Up 0.3 points since Sep 8, 2026

What each source reports

CVE List Score used 9.4

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

Record: CVE-2026-86509
CVSS 4.0: 9.4 CriticalCVSS: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
CVSS 3.1: 9.6 CriticalCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
CVSS 3.0: 9.6 CriticalCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
CVSS 2.0: 8.3 AV:A/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Weakness: CWE-121, CWE-119
Updated: 2026-11-02

EUVDEUVD-2026-72608 9.4

Record: EUVD-2026-72608
CVSS 4.0: 9.4 CriticalCVSS: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
Updated: 2026-11-02

GitHub AdvisoriesGHSA-xq27-3vwq-mgr2 8.6

A flaw has been found in D-Link DIR-895L A1_102b07. This impacts the function sendOffer/sendACK...

Record: GHSA-xq27-3vwq-mgr2
CVSS 4.0: 8.6 HighCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 9.6 CriticalCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-119
Updated: 2026-11-02

NVD 8.6

Record: CVE-2026-86509
CVSS 4.0: 8.6 HighCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 9.6 CriticalCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS 2.0: 8.3 HighAV:A/AC:L/Au:N/C:C/I:C/A:C
Weakness: CWE-119, CWE-121
Updated: 2026-11-02

Affected products

d-link dir-895l

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-86509 is a critical vulnerability (CVSS 9.4) in D-link Dir-895l, published September 8, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.72%, the 54th percentile. No source names a fixed version.