CVE-2021-36707Public exploitNetwork attack vector

Root command execution via unfiltered LED parameter

Published Aug 6, 2021 · Updated Aug 4, 2024

Command injection in ProLink PRC2402M firmware 1.0.18 and earlier allows remote authenticated users to execute commands as root. The set_ledonoff function in adm.cgi passes the led_cmd HTTP POST parameter directly to do_system, a wrapper for system, without neutralization. Access to the authenticated administrative console is required; successful exploitation yields a root shell and full control of the router.

CVSS severity9.8
Critical
EPSS probability2.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in ProLink PRC2402M firmware 1.0.18 and earlier allows remote authenticated users to execute commands as root. The set_ledonoff function in adm.cgi passes the led_cmd HTTP POST parameter directly to do_system, a wrapper for system, without neutralization. Access to the authenticated administrative console is required; successful exploitation yields a root shell and full control of the router.

The record

CVE
CVE-2021-36707
Published
Aug 6, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('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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