CVE-2026-90692: Stack-based Buffer Overflow in D-Link DIR-878
CVE-2026-90692 is a critical stack-based buffer overflow vulnerability in the D-Link DIR-878 router, specifically version 120B05. The flaw exists in the SetDynamicDNSIPv6Settings function of the Dynamic DNS IPv6 Settings component. An attacker can remotely trigger this vulnerability by manipulating the IPv6Address or Hostname argument, potentially leading to a buffer overflow on the stack.
AI Analysis
Technical Summary
This vulnerability affects D-Link DIR-878 version 120B05. The issue arises from improper handling of input in the SetDynamicDNSIPv6Settings function, where the IPv6Address or Hostname argument can be manipulated to cause a stack-based buffer overflow. The vulnerability can be exploited remotely without user interaction and requires low attack complexity and privileges. The CVSS 4.0 base score is 9.4, indicating critical severity.
Potential Impact
Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code or cause a denial of service on the affected device. Given the critical CVSS score and the nature of the buffer overflow, the impact is severe, potentially compromising device integrity and network security.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict remote access to the affected device and monitor for unusual activity related to Dynamic DNS IPv6 settings.
CVE-2026-90692: Stack-based Buffer Overflow in D-Link DIR-878
Description
CVE-2026-90692 is a critical stack-based buffer overflow vulnerability in the D-Link DIR-878 router, specifically version 120B05. The flaw exists in the SetDynamicDNSIPv6Settings function of the Dynamic DNS IPv6 Settings component. An attacker can remotely trigger this vulnerability by manipulating the IPv6Address or Hostname argument, potentially leading to a buffer overflow on the stack.
CVSS v4.0
Score 9.4critical
Affected software
D-Link
DIR-878
cpe:2.3:h:d-link:dir-878:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects D-Link DIR-878 version 120B05. The issue arises from improper handling of input in the SetDynamicDNSIPv6Settings function, where the IPv6Address or Hostname argument can be manipulated to cause a stack-based buffer overflow. The vulnerability can be exploited remotely without user interaction and requires low attack complexity and privileges. The CVSS 4.0 base score is 9.4, indicating critical severity.
Potential Impact
Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code or cause a denial of service on the affected device. Given the critical CVSS score and the nature of the buffer overflow, the impact is severe, potentially compromising device integrity and network security.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict remote access to the affected device and monitor for unusual activity related to Dynamic DNS IPv6 settings.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-09-13T05:09:14.905Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa79f7b55bf5e2cf5b17a1c
Added to database: 09/14/2026, 07:17:15 UTC
Last enriched: 09/14/2026, 07:31:27 UTC
Last updated: 09/14/2026, 07:49:30 UTC
Views: 5
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