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CVE-2026-89010— WAVLINK WN535M1/WN535M3 Unauthenticated OS Command Injection via sync_server

Quick assessment

Affected
WAVLINK Technology WN535M1
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WAVLINK WN535M1是中国WAVLINK公司的一款路由器。 WAVLINK WN535M1和WN535M3 M35M1_V250922之前版本存在命令注入漏洞，该漏洞源于未认证的OS命令注入，攻击者可通过向TCP端口13136的sync_server守护进程发送特制文件名，该守护进程未清理即通过sprintf()将含shell元字符的文件名插入shell命令并传递给system()，可能导致以root权限执行任意命令。

CVSS 9.8 · Critical EPSS 3.17% · P88

Affected Version Matrix 4

VendorProduct Version RangeStatus
WAVLINK Technology WN535M1 M35M1_V210223 affected
M35M1_V250922 unaffected
WAVLINK Technology WN535M3 M35M1_V210223 affected
M35M1_V250922 unaffected
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I. Basic Information for CVE-2026-89010

Vulnerability Information
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Vulnerability Title
WAVLINK WN535M1/WN535M3 Unauthenticated OS Command Injection via sync_server
Source: CVE Program / CVE List V5
Vulnerability Description
WAVLINK WN535M1 and WN535M3 routers running firmware prior to M35M1_V250922 contain an unauthenticated OS command injection vulnerability that allows remote attackers to execute arbitrary commands as root by sending crafted filenames to the sync_server daemon on TCP port 13136. The daemon interpolates attacker-controlled filename input containing shell metacharacters into a shell command string via sprintf() and passes it to system() without sanitization, enabling root-level command execution on the device.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
WAVLINK WN535M1 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WAVLINK WN535M1是中国WAVLINK公司的一款路由器。 WAVLINK WN535M1和WN535M3 M35M1_V250922之前版本存在命令注入漏洞，该漏洞源于未认证的OS命令注入，攻击者可通过向TCP端口13136的sync_server守护进程发送特制文件名，该守护进程未清理即通过sprintf()将含shell元字符的文件名插入shell命令并传递给system()，可能导致以root权限执行任意命令。
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 Technology WN535M1 M35M1_V210223 -
WAVLINK Technology WN535M3 M35M1_V210223 -

II. Public POCs for CVE-2026-89010

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III. Intelligence Information for CVE-2026-89010

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Vendor Advisories for CVE-2026-89010 (2)

Proof of Concept for CVE-2026-89010 (1)

Other References for CVE-2026-89010 (1)

IV. Related Vulnerabilities

Same product: WN535M1
Same vendor: WAVLINK Technology
Same weakness: CWE-78