CVE-2026-75976: Stack-based Buffer Overflow in TRENDnet TEW-823DRU
CVE-2026-75976 is a critical stack-based buffer overflow vulnerability in TRENDnet TEW-823DRU version 1.1.02b01. The flaw exists in the strcpy function within /cgi-bin/wan.cgi related to the NVRAM component, triggered by manipulation of the wan_l2tp_password argument. This vulnerability can be exploited remotely without user interaction. Public exploit code is available, increasing the risk of attack. No official patch or remediation guidance has been provided by the vendor as of the publication date.
AI Analysis
Technical Summary
This vulnerability involves a stack-based buffer overflow caused by improper handling of the wan_l2tp_password argument in the strcpy function of the /cgi-bin/wan.cgi file in TRENDnet TEW-823DRU firmware version 1.1.02b01. The overflow occurs in the NVRAM component, allowing remote attackers to potentially execute arbitrary code or cause denial of service. The vulnerability has a CVSS 4.0 score of 9.4, indicating critical severity. Exploit code has been publicly released, but no vendor patch or official remediation has been documented.
Potential Impact
Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code or cause a denial of service on affected devices. Given the critical CVSS score and public availability of exploit code, affected devices are at high risk if exposed to untrusted networks.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting remote access to the device's management interface and monitoring for suspicious activity related to the wan_l2tp_password parameter.
CVE-2026-75976: Stack-based Buffer Overflow in TRENDnet TEW-823DRU
Description
CVE-2026-75976 is a critical stack-based buffer overflow vulnerability in TRENDnet TEW-823DRU version 1.1.02b01. The flaw exists in the strcpy function within /cgi-bin/wan.cgi related to the NVRAM component, triggered by manipulation of the wan_l2tp_password argument. This vulnerability can be exploited remotely without user interaction. Public exploit code is available, increasing the risk of attack. No official patch or remediation guidance has been provided by the vendor as of the publication date.
CVSS v4.0
Score 9.4critical
Affected software
cpe:2.3:a:trendnet:tew-823dru:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a stack-based buffer overflow caused by improper handling of the wan_l2tp_password argument in the strcpy function of the /cgi-bin/wan.cgi file in TRENDnet TEW-823DRU firmware version 1.1.02b01. The overflow occurs in the NVRAM component, allowing remote attackers to potentially execute arbitrary code or cause denial of service. The vulnerability has a CVSS 4.0 score of 9.4, indicating critical severity. Exploit code has been publicly released, but no vendor patch or official remediation has been documented.
Potential Impact
Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code or cause a denial of service on affected devices. Given the critical CVSS score and public availability of exploit code, affected devices are at high risk if exposed to untrusted networks.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting remote access to the device's management interface and monitoring for suspicious activity related to the wan_l2tp_password parameter.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-18T18:12:17.812Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a84efa2c6e8be0332e51acd
Added to database: 08/18/2026, 23:49:54 UTC
Last enriched: 08/19/2026, 00:04:19 UTC
Last updated: 08/19/2026, 00:24:02 UTC
Views: 21
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.