A vulnerability has been found in Wavlink WL-NU516U1 708c073-mt7628. This affects the function fgets of the file nas.cgi. The manipulation of the argument CONTENT_LENGTH leads to stack-based buffer overflow. Remote exploitation of the attack is possible. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Wavlink
  • Wl-nu516u1
  • Wl-nu516u1 Firmware

No data.

No data.

References
Link Providers
https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-07-13-4b8a21f-mt7628-squashfs-sysupgrade.bin cve-icon
https://github.com/oduoke567/WAVLINK-NU516U1-2026-05-1/blob/main/report2.md cve-icon
https://vuldb.com/cve/CVE-2026-18588 cve-icon
https://vuldb.com/submit/850500 cve-icon
https://vuldb.com/vuln/385416 cve-icon
https://vuldb.com/vuln/385416/cti cve-icon
History

Mon, 03 Aug 2026 08:00:00 +0000

Type Values Removed Values Added
First Time appeared Wavlink wl-nu516u1
Vendors & Products Wavlink wl-nu516u1

Mon, 03 Aug 2026 06:45:00 +0000

Type Values Removed Values Added
Description A vulnerability has been found in Wavlink WL-NU516U1 708c073-mt7628. This affects the function fgets of the file nas.cgi. The manipulation of the argument CONTENT_LENGTH leads to stack-based buffer overflow. Remote exploitation of the attack is possible. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Title Wavlink WL-NU516U1 nas.cgi fgets stack-based overflow
First Time appeared Wavlink
Wavlink wl-nu516u1 Firmware
Weaknesses CWE-119
CWE-121
CPEs cpe:2.3:o:wavlink:wl-nu516u1_firmware:*:*:*:*:*:*:*:*
Vendors & Products Wavlink
Wavlink wl-nu516u1 Firmware
References
Metrics cvssV2_0

{'score': 10, 'vector': 'AV:N/AC:L/Au:N/C:C/I:C/A:C/E:ND/RL:OF/RC:C'}

cvssV3_0

{'score': 9.8, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:O/RC:C'}

cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:O/RC:C'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-08-03T06:00:11.107Z

Updated: 2026-08-03T06:00:11.107Z

Reserved: 2026-08-02T20:33:29.434Z

Link: CVE-2026-18588

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.