Vulnerability · Published Sep 7, 2026 · Assigned by VulDB
CVE-2026-86296D-Link DIR-822A udhcpcd serverpacket.c strcpy stack-based overflow
Critical 10.0
In plain English
A critical-severity stack buffer overflow in DIR-822A from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.4% (higher than 84% of all known vulnerabilities).
Severity (CVSS 3.1)10.0Critical
Exploit odds (30 days)2.4%top 16.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-399458 | D-Link DIR-822A udhcpcd serverpacket.c strcpy stack-based overflow vdb-entry, technical-description
- VDB-399458 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-86296 | CVE Analysis and Report third-party-advisory
- Submit #906297 | D-Link DIR822A_101 A_101 Stack-based Buffer Overflow third-party-advisory
- https://tzh00203.notion.site/D-Link-DIR-822A-Stack-Overflow-in-udhcpd-TR-111-Option-125-Parsing-33cb5c52018a80238b80e89e7c7c68f0 exploit
- https://www.dlink.com/ product