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.

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

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.

Affected products

D-link Dir-822a — versions A_101

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (exploit)
cna@vuldb.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.