CVE-2026-86296: D-Link DIR-822A udhcpcd serverpacket.c strcpy stack-based overflow
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-08 00:03 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
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.
Description quoted from the CVE record (assigned by VulDB, published 2026-09-07).
Weakness: Stack-based Buffer Overflow; Memory Corruption
How it can be exploited
Exploitable over the network with low attack complexity with no special attack requirements needing no privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. 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
CISA assessment (SSVC): CISA assesses that a public proof of concept exists. Automatable: yes. Technical impact: total.
Public exploit evidence (Exploit Observer)
Exploit Observer has not indexed exploit code for this CVE, but the CVE record links exploit code (see the references below). Check Exploit Observer for more.
Live scores
- EPSS
- 0.024
some chance of attack soon - VEDAS
- 0.060
little exploit evidence - On CISA KEV
- Not listed
- Detection rule
- No public rule yet
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| D-Link DIR-822A | version A_101 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
How to fix it
No fixed version or vendor advisory is listed in the CVE record yet. Watch the vendor’s security page.
How to detect it
There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.
Advisories on this CVE
References
Exploit code
Technical analysis and advisories
- VDB-399458 | D-Link DIR-822A udhcpcd serverpacket.c strcpy stack-based overflow (vdb-entry, technical-description)
- 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)
Other references
- VDB-399458 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- https://www.dlink.com/ (product)
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.
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