CVE-2026-9543Public exploitNetwork attack vector

Root command execution via unsanitized admpass

Published May 26, 2026 · Updated May 26, 2026

OS command injection in the N300RH web interface 6.1c.1353_B20190305 allows remote attackers to execute commands as root via admpass. The setPasswordCfg handler in /cgi-bin/cstecgi.cgi passes the user-controlled admpass value into an operating-system command without sanitization or escaping shell metacharacters. The handler is reachable without authentication or user interaction, granting root-level control of the router when its management interface is network-accessible.

CVSS severityUnavailable
Unscored
EPSS probability2.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

OS command injection in the N300RH web interface 6.1c.1353_B20190305 allows remote attackers to execute commands as root via admpass. The setPasswordCfg handler in /cgi-bin/cstecgi.cgi passes the user-controlled admpass value into an operating-system command without sanitization or escaping shell metacharacters. The handler is reachable without authentication or user interaction, granting root-level control of the router when its management interface is network-accessible.

The record

CVE
CVE-2026-9543
Published
May 26, 2026
Updated
May 26, 2026
Vendor
TOTOLINK
Product
N300RH Firmware
Classifications
CWE-78, CWE-77, T1190, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2026CVE publishedPublication date reported by the CVE source.
  2. May 26, 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=6.1c.1353_B20190305

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · N300RH Firmwareversion=6.1c.1353_B20190305

Published CVSS scores

9.3VulDB CNACVSS: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:P
9.8VulDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
10.0VulDB CNAAV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
9.8VulDB CNACVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1190Exploit Public-Facing Application
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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