CVE-2026-2877

HIGH
2026-02-21 [email protected]
8.8
CVSS 3.1
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CVSS Vector

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

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:04 vuln.today
CVE Published
Feb 21, 2026 - 19:15 nvd
HIGH 8.8

Tags

Buffer Overflow Stack Overflow A18 Firmware

Description

A vulnerability has been found in Tenda A18 15.13.07.13. This affects the function strcpy of the file /goform/WifiExtraSet of the component Httpd Service. The manipulation of the argument wpapsk_crypto5g leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Analysis

Stack-based buffer overflow in Tenda A18 firmware versions up to 15.13.07.13 allows remote attackers with low privileges to achieve code execution through the wpapsk_crypto5g parameter in the /goform/WifiExtraSet endpoint. Public exploit code exists for this vulnerability, and no patch is currently available. …

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Remediation

Within 24 hours: Inventory all Tenda A18 devices running firmware 15.13.07.13 and isolate affected units from production networks if possible. Within 7 days: Implement network segmentation to restrict administrative access to these devices and enable WAF rules blocking malformed requests to /goform/WifiExtraSet endpoint. …

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Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +44
POC: 0

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CVE-2026-2877 vulnerability details – vuln.today
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