CVE-2026-3613

HIGH
2026-03-06 [email protected]
7.2
CVSS 3.1
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CVSS Vector

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

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 22:06 vuln.today
PoC Detected
Mar 10, 2026 - 18:30 vuln.today
Public exploit code
CVE Published
Mar 06, 2026 - 02:15 nvd
HIGH 7.2

Tags

Buffer Overflow Stack Overflow Wl Nu516u1 Firmware

Description

A vulnerability was identified in Wavlink WL-NU516U1 V240425. This vulnerability affects the function sub_401A0C of the file /cgi-bin/login.cgi. Such manipulation of the argument ipaddr leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.

Analysis

Stack-based buffer overflow in Wavlink WL-NU516U1 firmware's login.cgi allows remote attackers with high privileges to achieve complete system compromise through a malformed ipaddr parameter. Public exploit code exists for this vulnerability, and no patch is currently available. …

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Remediation

Within 24 hours: Inventory all Wavlink WL-NU516U1 V240425 devices in production; isolate or disable internet-facing instances; implement network access controls limiting login.cgi access to trusted administrative subnets only. Within 7 days: Deploy WAF rules blocking suspicious requests to /cgi-bin/login.cgi; consider firmware downgrade if earlier versions are unaffected; engage Wavlink support for patch ETA. …

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Priority Score

56
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +36
POC: +20

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CVE-2026-3613 vulnerability details – vuln.today
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