CVE-2021-1558

Root command execution via restricted CLI commands

Published May 22, 2021 · Updated Nov 8, 2024

OS command injection in Cisco DNA Spaces Connector before 2.3.1 allows local users to execute arbitrary commands as root via the CLI. Affected CLI commands enforce insufficient execution restrictions, allowing the dnasadmin account to cross the intended privilege boundary. An authenticated dnasadmin session is required, and successful exploitation grants root-level command execution without reported availability impact.

CVSS severity6.0
Medium
EPSS probability0.33%
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 Cisco DNA Spaces Connector before 2.3.1 allows local users to execute arbitrary commands as root via the CLI. Affected CLI commands enforce insufficient execution restrictions, allowing the dnasadmin account to cross the intended privilege boundary. An authenticated dnasadmin session is required, and successful exploitation grants root-level command execution without reported availability impact.

The record

CVE
CVE-2021-1558
Published
May 22, 2021
Updated
Nov 8, 2024
Vendor
ClamAV
Product
Cisco Spaces: Connector
Classifications
CWE-78, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 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=n/a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Spaces: Connectorversion=n/a

Published CVSS scores

7.2NISTAV:L/AC:L/Au:N/C:C/I:C/A:C
7.8NISTCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.0Cisco Systems, Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:X/RL:X/RC:X

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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