CVE-2026-4861— Wavlink WL-NU516U1 nas.cgi ftext stack-based overflow
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I. Basic Information for CVE-2026-4861
Vulnerability Information
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Vulnerability Title
Wavlink WL-NU516U1 nas.cgi ftext stack-based overflow
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
WAVLINK WL-NU516U1 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WAVLINK WL-NU516U1是中国睿因（WAVLINK）公司的一款无线打印服务器。 WAVLINK WL-NU516U1 260227版本存在安全漏洞，该漏洞源于对文件/cgi-bin/nas.cgi中函数ftext的参数Content-Length的错误操作，可能导致基于栈的缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Wavlink | WL-NU516U1 | 260227 | cpe:2.3:o:wavlink:wl-nu516u1_firmware:*:*:*:*:*:*:*:* |
II. Public POCs for CVE-2026-4861
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|---|
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- Submit #776217: Wavlink NU516U1 V260227 Stack-based Buffer Overflowthird-party-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-4861
IV. Related Vulnerabilities
Same product: WL-NU516U1
- CVE-2026-4166
Wavlink WL-NU516U1 login.cgi sub_404F68 cross site scripting - CVE-2026-3662
Wavlink WL-NU516U1 adm.cgi usb_p910 command injection - CVE-2026-3661
Wavlink WL-NU516U1 adm.cgi ota_new_upgrade command injection - CVE-2026-3613
Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow - CVE-2026-3612
Wavlink WL-NU516U1 OTA Online Upgrade adm.cgi sub_405AF4 com
Same vendor: Wavlink
- CVE-2026-8230
Wavlink NU516U1 login.cgi sys_login1 os command injection - CVE-2026-8229
Wavlink NU516U1 wireless.cgi WifiBasic os command injection - CVE-2026-8228
Wavlink NU516U1 wireless.cgi advance os command injection - CVE-2026-8227
Wavlink NU516U1 adm.cgi wzdapMesh os command injection - CVE-2026-8192
Wavlink NU516U1 adm.cgi wzdap os command injection
Same weakness: CWE-121
- CVE-2026-8258
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PgBouncer buffer overflow in SCRAM - CVE-2026-41509
Integer underflow in crypto_sign_open() leads to buffer over - CVE-2026-8138
Tenda CX12L SetPptpServerCfg” formSetPPTPServer stack-based
V. Comments for CVE-2026-4861
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