CVE-2026-36778: n/a
Shenzhen Tenda Technology Co., Ltd Tenda O3 Wireless Router v1.0.0.5(4180) was discovered to contain a stack overflow in the username parameter of the R7WebsSecurityHandler function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
AI Analysis
Technical Summary
CVE-2026-36778 describes a stack overflow vulnerability in the username parameter of the R7WebsSecurityHandler function in Tenda O3 Wireless Router version 1.0.0.5(4180). An attacker with high privileges can send a specially crafted HTTP request to trigger this overflow, resulting in a denial of service condition. The vulnerability is classified under CWE-121 (Stack-based Buffer Overflow). There is no available patch or vendor advisory detailing remediation at this time.
Potential Impact
Successful exploitation results in denial of service (DoS) by crashing or destabilizing the affected router. There is no indication of confidentiality or integrity impact. The attack requires network access and high privileges. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the router's management interface to trusted users only and monitor for unusual HTTP requests targeting the username parameter.
CVE-2026-36778: n/a
Description
Shenzhen Tenda Technology Co., Ltd Tenda O3 Wireless Router v1.0.0.5(4180) was discovered to contain a stack overflow in the username parameter of the R7WebsSecurityHandler function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
CVSS v3.1
Score 4.9medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-36778 describes a stack overflow vulnerability in the username parameter of the R7WebsSecurityHandler function in Tenda O3 Wireless Router version 1.0.0.5(4180). An attacker with high privileges can send a specially crafted HTTP request to trigger this overflow, resulting in a denial of service condition. The vulnerability is classified under CWE-121 (Stack-based Buffer Overflow). There is no available patch or vendor advisory detailing remediation at this time.
Potential Impact
Successful exploitation results in denial of service (DoS) by crashing or destabilizing the affected router. There is no indication of confidentiality or integrity impact. The attack requires network access and high privileges. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the router's management interface to trusted users only and monitor for unusual HTTP requests targeting the username parameter.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-04-06T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2923ff8dd33fbd85129a93
Added to database: 06/10/2026, 08:44:47 UTC
Last enriched: 06/17/2026, 16:06:31 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 66
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.
External Links
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.