CVE-2025-65226

MEDIUM
2025-11-20 [email protected]
4.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

3
Analysis Generated
Mar 28, 2026 - 19:23 vuln.today
PoC Detected
Nov 21, 2025 - 17:24 vuln.today
Public exploit code
CVE Published
Nov 20, 2025 - 15:17 nvd
MEDIUM 4.3

Tags

Tenda Buffer Overflow Ac21 Firmware

Description

Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the deviceId parameter in /goform/saveParentControlInfo.

Analysis

Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the deviceId parameter in /goform/saveParentControlInfo. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical Context

This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the deviceId parameter in /goform/saveParentControlInfo. Affected products include: Tenda Ac21 Firmware.

Affected Products

Tenda Ac21 Firmware.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.

Priority Score

42
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +22
POC: +20

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CVE-2025-65226 vulnerability details – vuln.today
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