CVE-2026-86296criticalCWE-119CWE-121

CVE-2026-86296: critical vulnerability in D-Link DIR-822A

D-Link DIR-822A udhcpcd serverpacket.c strcpy stack-based overflow

Published · Updated

48Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 10epss 2.4%
exploitation probability
2.4%top 16% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
Affected products
D-Link · DIR-822A
public PoCs found — 1
cve_referencetzh00203.notion.site/D-Link-DIR-822A-Stack-Overflow-in-udhcpd-TR-111-Option-125-Parsing-33cb5c52018a80238b80e89e7c7c68f0unverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — D-Link DIR-822A

In the same product, most dangerous first.

CVE-2026-86510CRITICALD-Link DIR-822A L2TP Control Message tunnel_set_params out-of-bounds writeEPSS 0.8%
References
https://tzh00203.notion.site/D-Link-DIR-822A-Stack-Overflow-in-udhcpd-TR-111-Option-125-Parsing-33cb5c52018a80238b80e89e7c7c68f0https://vuldb.com/cve/CVE-2026-86296https://vuldb.com/submit/906297https://vuldb.com/vuln/399458https://vuldb.com/vuln/399458/ctihttps://www.dlink.com/