W20e Firmware CVE-2026-24115
CRITICAL
Classic Buffer Overflow (CWE-120)
2026-03-02
cve@mitre.org
9.8
CVSS 3.1
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CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Lifecycle Timeline
3
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Mar 03, 2026 - 21:15 vuln.today
Public exploit code
CVE Published
Mar 02, 2026 - 15:16 nvd
CRITICAL 9.8
DescriptionNVD
An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Failure to validate the sizes of gstup and gstdwn before concatenating them into gstruleQos may lead to buffer overflow.
AnalysisAI
Tenda W20E has a seventh buffer overflow in gstup parameter handling.
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RemediationAI
Within 24 hours: Inventory all Tenda W20E V4.0br_V15.11.0.6 devices and isolate critical ones from production networks if possible. Within 7 days: Implement network segmentation to restrict router access, disable remote administration interfaces, and monitor for exploitation attempts. …
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External POC / Exploit Code
Leaving vuln.today
Destination URL
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