CVE-2026-89010Public exploitNetwork attack vector

Root command execution via unsanitized filenames

Published Sep 11, 2026 · Updated Sep 11, 2026

Command injection in WAVLINK WN535M1 and WN535M3 M35M1_V210223 allows remote attackers to execute root commands via sync_server. The daemon inserts untrusted filenames into a shell command using sprintf() and invokes system() without neutralizing shell metacharacters. Exploitation requires mesh mode and network access to TCP port 13136, but no credentials or user interaction; mesh mode is enabled by default on WN535M1.

CVSS severity9.3
Critical
EPSS probability3.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in WAVLINK WN535M1 and WN535M3 M35M1_V210223 allows remote attackers to execute root commands via sync_server. The daemon inserts untrusted filenames into a shell command using sprintf() and invokes system() without neutralizing shell metacharacters. Exploitation requires mesh mode and network access to TCP port 13136, but no credentials or user interaction; mesh mode is enabled by default on WN535M1.

The record

CVE
CVE-2026-89010
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
Winstars Technology Limited
Product
WN535M1
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=M35M1_V210223

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Winstars Technology Limited · WN535M1version=M35M1_V210223
Winstars Technology Limited · WN535M3version=M35M1_V210223

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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