CVE-2026-7851: Stack-based Buffer Overflow in D-Link DI-8100
CVE-2026-7851 is a high-severity stack-based buffer overflow vulnerability in the D-Link DI-8100 router firmware version 16.07.26A1. The flaw exists in the sprintf function within the yyxz.asp file, where improper handling of the ID argument allows remote attackers to trigger a buffer overflow. Exploitation can be performed remotely without user interaction and requires high privileges. Although an exploit is publicly available, there are no confirmed reports of exploitation in the wild. No official patch or remediation guidance has been provided by the vendor at this time.
AI Analysis
Technical Summary
This vulnerability affects D-Link DI-8100 firmware version 16.07.26A1. The sprintf function in the yyxz.asp file improperly processes the ID parameter, leading to a stack-based buffer overflow. The vulnerability can be exploited remotely without user interaction but requires high privileges. The CVSS 4.0 base score is 8.6, indicating a high severity with network attack vector, low attack complexity, no privileges required for attack initiation, and high impact on confidentiality, integrity, and availability. No official patch or vendor advisory is currently available, and the product is not a cloud service.
Potential Impact
Successful exploitation of this vulnerability could allow a remote attacker with high privileges to execute arbitrary code on the affected device, potentially leading to full compromise of the router. This could impact confidentiality, integrity, and availability of the device and its network traffic. Given the high CVSS score and remote exploitability, this represents a significant risk to affected systems.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should restrict access to the affected device's management interfaces to trusted networks only and monitor for any unusual activity. Avoid exposing the device management interface to untrusted networks. Follow vendor communications closely for updates on patches or official mitigations.
CVE-2026-7851: Stack-based Buffer Overflow in D-Link DI-8100
Description
CVE-2026-7851 is a high-severity stack-based buffer overflow vulnerability in the D-Link DI-8100 router firmware version 16.07.26A1. The flaw exists in the sprintf function within the yyxz.asp file, where improper handling of the ID argument allows remote attackers to trigger a buffer overflow. Exploitation can be performed remotely without user interaction and requires high privileges. Although an exploit is publicly available, there are no confirmed reports of exploitation in the wild. No official patch or remediation guidance has been provided by the vendor at this time.
CVSS v4.0
Score 8.6high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects D-Link DI-8100 firmware version 16.07.26A1. The sprintf function in the yyxz.asp file improperly processes the ID parameter, leading to a stack-based buffer overflow. The vulnerability can be exploited remotely without user interaction but requires high privileges. The CVSS 4.0 base score is 8.6, indicating a high severity with network attack vector, low attack complexity, no privileges required for attack initiation, and high impact on confidentiality, integrity, and availability. No official patch or vendor advisory is currently available, and the product is not a cloud service.
Potential Impact
Successful exploitation of this vulnerability could allow a remote attacker with high privileges to execute arbitrary code on the affected device, potentially leading to full compromise of the router. This could impact confidentiality, integrity, and availability of the device and its network traffic. Given the high CVSS score and remote exploitability, this represents a significant risk to affected systems.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should restrict access to the affected device's management interfaces to trusted networks only and monitor for any unusual activity. Avoid exposing the device management interface to untrusted networks. Follow vendor communications closely for updates on patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-05T11:17:33.955Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fa2e1dcbff5d8610171ce4
Added to database: 05/05/2026, 17:51:25 UTC
Last enriched: 05/13/2026, 03:53:21 UTC
Last updated: 08/03/2026, 19:18:02 UTC
Views: 114
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