Vulnerability · Published Sep 8, 2026 · Assigned by VulDB
CVE-2026-86509D-Link DIR-895L udhcpcd serverpacket.c sendACK stack-based overflow
Critical 9.6
In plain English
A critical-severity stack buffer overflow in DIR-895L from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).
Severity (CVSS 3.1)9.6Critical
Exploit odds (30 days)0.7%top 45.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: 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
References
- VDB-399662 | D-Link DIR-895L udhcpcd serverpacket.c sendACK stack-based overflow vdb-entry, technical-description
- VDB-399662 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-86509 | CVE Analysis and Report third-party-advisory
- Submit #906298 | D-Link DIR895LA1_102b07 A1_102b07 Stack-based Buffer Overflow third-party-advisory
- https://tzh00203.notion.site/D-Link-DIR-895L-Stack-Overflow-in-udhcpd-TR-111-Option-125-Parsing-33cb5c52018a80dc8140e1502e4814d0 exploit
- https://www.dlink.com/ product