CVE-2021-26724Network attack vector

Administrator command execution via date or hostname changes

Published Feb 22, 2021 · Updated Sep 17, 2024

OS command injection in Nozomi Networks Guardian and CMC 20.0.7.3 and earlier allows remote authenticated users to execute commands. The management interface passes attacker-controlled date or hostname values into local OS command execution without adequately neutralizing command syntax. Administrator access to the management web GUI is required; successful injection enables arbitrary local commands and subsequent root privilege escalation.

CVSS severity8.6
High
EPSS probability2.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Nozomi Networks Guardian and CMC 20.0.7.3 and earlier allows remote authenticated users to execute commands. The management interface passes attacker-controlled date or hostname values into local OS command execution without adequately neutralizing command syntax. Administrator access to the management web GUI is required; successful injection enables arbitrary local commands and subsequent root privilege escalation.

The record

CVE
CVE-2021-26724
Published
Feb 22, 2021
Updated
Sep 17, 2024
Vendor
Nozomi Networks
Product
Guardian
Classifications
CWE-78, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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?

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

  1. Affected versionversion=20.0.7.3 and prior versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Nozomi Networks · Guardianversion=20.0.7.3 and prior versions
Nozomi Networks · Central Management Console (CMC)version=20.0.7.3 and prior versions

Published CVSS scores

7.2Nozomi NetworksCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.6Nozomi NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:H/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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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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