Buffer overflow in D-Link Dir-822a
CVE-2026-86296
A vulnerability was determined in D-Link DIR-822A A_101. This vulnerability affects the function strcpy of the file udhcpcd/serverpacket.c of the component udhcpcd. This manipulation causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.017 (77.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.017 · change: +0.004
Affected products
- D-Link Dir-822a — versions A_101
Weakness classification (CWE)
References
- vuldb.com/vuln/399458 (technical-description, vdb-entry)
- vuldb.com/vuln/399458/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-86296 (third-party-advisory)
- vuldb.com/submit/906297 (third-party-advisory)
- tzh00203.notion.site/D-Link-DIR-822A-Stack-Overflow-in-udhcpd-TR-111-Option-125… (exploit)
- www.dlink.com/ (product)
Frequently asked questions
- What is CVE-2026-86296?
- CVE-2026-86296 is a critical-severity vulnerability in D-Link Dir-822a, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 10.0/10. Published 2026-09-07.
- How severe is CVE-2026-86296?
- Critical severity. CVSS v3 base score is 10.0 out of 10.