CVE-2026-4861

HIGH EPSS 53.6%
Published Mar 26, 20263mo ago · Modified Jun 17, 20261w ago
7.4 CVSS 4.0
High
Find Similar
Published Mar 26, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

A weakness has been identified in Wavlink WL-NU516U1 260227. This vulnerability affects the function ftext of the file /cgi-bin/nas.cgi. This manipulation of the argument Content-Length causes stack-based buffer overflow. The attack can be initiated remotely. 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.

CVSS Details

Base Score
7.4
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
53.6% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Memory Safety
CWE-121

Affected Products 2

VendorProductVersionRange
wavlinkwl-nu516u1_firmwarem16u1_v260227any
wavlinkwl-nu516u1*any

References 4

  • github.com https://github.com/Wlz1112/WAVLINK-NU516U1-V260227/blob/main/Content-Length.md
    ExploitThird Party Advisory
  • vuldb.com https://vuldb.com/?ctiid.353192
    Permissions RequiredVDB Entry
  • vuldb.com https://vuldb.com/?id.353192
    Third Party AdvisoryVDB Entry
  • vuldb.com https://vuldb.com/?submit.776217
    Third Party AdvisoryVDB Entry

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.