CVE-2023-20035

Root command execution via unvalidated CLI input

Published Mar 23, 2023 · Updated Oct 28, 2024

Command injection in Cisco IOS XE SD-WAN Software allows local users to execute operating-system commands with root privileges. The system CLI insufficiently validates crafted command input before passing it to the underlying operating system. Exploitation requires authentication through a local terminal or management shell and command-running privileges; low-privileged users gain complete device control.

CVSS severity7.8
High
EPSS probability0.22%
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 Cisco IOS XE SD-WAN Software allows local users to execute operating-system commands with root privileges. The system CLI insufficiently validates crafted command input before passing it to the underlying operating system. Exploitation requires authentication through a local terminal or management shell and command-running privileges; low-privileged users gain complete device control.

The record

CVE
CVE-2023-20035
Published
Mar 23, 2023
Updated
Oct 28, 2024
Vendor
ClamAV
Product
Cisco IOS XE Software
Classifications
CWE-146, T1059
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 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 IOS XE Softwareversion=n/a

Published CVSS scores

7.8Cisco Systems, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-146Improper Neutralization of Expression/Command Delimiters
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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