CVE-2026-86296: Stack-based Buffer Overflow in D-Link DIR-822A
Description
CVE-2026-86296 is a critical stack-based buffer overflow vulnerability in the D-Link DIR-822A A_101 router. It is caused by unsafe use of the strcpy function in the udhcpcd/serverpacket.c component. The vulnerability can be exploited remotely without authentication. Public exploit code has been disclosed, increasing the risk of exploitation.
CVSS v4.0
Score 10.0critical
Affected software
D-Link
DIR-822A
cpe:2.3:h:d-link:dir-822a:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-86296) affects the D-Link DIR-822A A_101 router and is a stack-based buffer overflow due to unsafe use of strcpy in the udhcpcd/serverpacket.c component. It allows remote unauthenticated attackers to exploit the flaw, potentially leading to arbitrary code execution or denial of service. The CVSS v4.0 score is 10.0, indicating critical severity. Public exploit code is available, which heightens the threat level. No patch or remediation information is provided in the input data.
Potential Impact
The vulnerability allows remote attackers to exploit a stack-based buffer overflow without authentication, which can lead to complete compromise of the affected device. Given the critical CVSS score of 10.0 and public exploit code availability, the impact is severe, potentially enabling remote code execution or device takeover.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict network access to the affected device from untrusted networks to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-09-06T16:15:06.544Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a9e940facd9273b4974db54
Added to database: 09/07/2026, 10:38:07 UTC
Last enriched: 09/22/2026, 13:03:04 UTC
Last updated: 10/22/2026, 01:15:26 UTC
Views: 120
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.