What is the CVSS score of CVE-2026-2565?

CVE-2026-2565 has a CVSS 3.1 base score of 6.6 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Wl Nu516u1 Firmware are affected by CVE-2026-2565?

Organizations using A weakness should be aware of notable risk from CVE-2026-2565, a buffer overflow vulnerability rated CVSS 6.6. Exploitation could cause memory corruption or application crashes.

Is there a public PoC exploit available for CVE-2026-2565?

Yes, a public proof-of-concept exploit is available for CVE-2026-2565. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-2565?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Wl Nu516u1 Firmware CVE-2026-2565

MEDIUM

Buffer Overflow (CWE-119)

2026-02-16 cna@vuldb.com

Buffer Overflow Stack Overflow Wl Nu516u1 Firmware

6.6

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.6 MEDIUM

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

Attack Vector

Network

Attack Complexity

High

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 - 19:42 vuln.today

Public exploit code

CVE Published

Feb 16, 2026 - 17:18 nvd

MEDIUM 6.6

DescriptionCVE.org

A weakness has been identified in Wavlink WL-NU516U1 20251208. Affected by this issue is the function sub_40785C of the file /cgi-bin/adm.cgi. This manipulation of the argument time_zone causes stack-based buffer overflow. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitation is known to be difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Stack overflow in Wavlink WL-NU516U1 firmware's /cgi-bin/adm.cgi allows remote attackers with high privileges to achieve code execution via a malicious time_zone parameter. Public exploit code exists for this vulnerability, though exploitation requires high complexity and the vendor has not released a patch.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects Wl-Nu516U1 Firmware. A weakness has been identified in Wavlink WL-NU516U1 20251208. Affected by this issue is the function sub_40785C of the file /cgi-bin/adm.cgi. This manipulation of the argument time_zone causes stack-based buffer overflow. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitation is known to be difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not

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.