Buffer overflow in D-Link Dir-895l
CVE-2026-86509
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (53.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
- D-Link Dir-895l — versions A1_102b07
Weakness classification (CWE)
References
- tzh00203.notion.site/D-Link-DIR-895L-Stack-Overflow-in-udhcpd-TR-111-Option-125… (exploit)
- vuldb.com/cve/CVE-2026-86509 (third-party-advisory)
- vuldb.com/submit/906298 (third-party-advisory)
- vuldb.com/vuln/399662 (technical-description, vdb-entry)
- vuldb.com/vuln/399662/cti (signature, permissions-required)
- www.dlink.com/ (product)
Frequently asked questions
- What is CVE-2026-86509?
- CVE-2026-86509 is a critical-severity vulnerability in D-Link Dir-895l, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.6/10. Published 2026-09-08.
- How severe is CVE-2026-86509?
- Critical severity. CVSS v3 base score is 9.6 out of 10.