What is the CVSS score of CVE-2026-2567?

CVE-2026-2567 has a CVSS 3.1 base score of 7.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Wl Nu516u1 Firmware are affected by CVE-2026-2567?

A HIGH severity vulnerability (CVE-2026-2567) affects Wavlink WL-NU516U1 network devices with no vendor patch currently available.

Is there a public PoC exploit available for CVE-2026-2567?

Yes, a public proof-of-concept exploit is available for CVE-2026-2567. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-2567?

Within 24 hours: Inventory all Wavlink WL-NU516U1 devices in your environment and isolate them to trusted networks only; disable remote management access if not operationally critical. Within 7 days: Implement network segmentation to restrict access to /cgi-bin/nas.cgi endpoints; deploy WAF rules to block suspicious requests to this path; establish daily monitoring for exploit attempts. Within 30 days: Monitor vendor advisories for patch availability; prepare for immediate deployment upon release; evaluate replacement with alternative vendors if patch timeline extends beyond 60 days.

Wl Nu516u1 Firmware CVE-2026-2567

HIGH

Buffer Overflow (CWE-119)

2026-02-16 cna@vuldb.com

Buffer Overflow Stack Overflow Wl Nu516u1 Firmware

7.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.2 HIGH

AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 18, 2026 - 19:41 vuln.today

Public exploit code

CVE Published

Feb 16, 2026 - 18:19 nvd

HIGH 7.2

DescriptionCVE.org

A vulnerability was detected in Wavlink WL-NU516U1 20251208. This vulnerability affects the function sub_401218 of the file /cgi-bin/nas.cgi. Performing a manipulation of the argument User1Passwd results in stack-based buffer overflow. The attack may be initiated remotely. The exploit is now public and may be used.

AnalysisAI

Remote code execution in Wavlink WL-NU516U1 firmware through a stack-based buffer overflow in the nas.cgi User1Passwd parameter allows unauthenticated network attackers to achieve full system compromise. Public exploit code exists for this vulnerability, and no patch is currently available, leaving affected devices at immediate risk.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects Wl-Nu516U1 Firmware. A vulnerability was detected in Wavlink WL-NU516U1 20251208. This vulnerability affects the function sub_401218 of the file /cgi-bin/nas.cgi. Performing a manipulation of the argument User1Passwd results in stack-based buffer overflow. The attack may be initiated remotely. The exploit is now public and may be used.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.