CVE-2021-1485

Root command execution via crafted CLI input

Published Apr 8, 2021 · Updated Nov 8, 2024

Command injection in Cisco IOS XR 64-Bit Software before 7.3.1 allows local users to execute Linux commands with root privileges. The CLI insufficiently validates user-supplied text before passing it to an affected command, allowing injected command delimiters to reach the underlying Linux environment. Exploitation requires authenticated device CLI access and crafted input to an affected command; successful injection runs with root privileges.

CVSS severity6.6
Medium
EPSS probability0.32%
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 XR 64-Bit Software before 7.3.1 allows local users to execute Linux commands with root privileges. The CLI insufficiently validates user-supplied text before passing it to an affected command, allowing injected command delimiters to reach the underlying Linux environment. Exploitation requires authenticated device CLI access and crafted input to an affected command; successful injection runs with root privileges.

The record

CVE
CVE-2021-1485
Published
Apr 8, 2021
Updated
Nov 8, 2024
Vendor
ClamAV
Product
Cisco IOS XR Software
Classifications
CWE-88, T1059
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 8, 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?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

ClamAV · Cisco IOS XR Softwareversion=n/a

Published CVSS scores

6.6CiscoCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L/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-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
T1059Command and Scripting Interpreter

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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