CVE-2021-1262

Root command execution via insufficient CLI validation

Published Jan 20, 2021 · Updated Sep 16, 2024

Command injection in Cisco SD-WAN Software allows local users with read-only credentials to execute root commands and read device files. The device CLI passes crafted command input without sufficient validation, allowing injected commands to run with root privileges. Exploitation requires an authenticated read-only CLI session; Cisco reports file disclosure but no file modification or service interruption for this CVE.

CVSS severity5.5
Medium
EPSS probability1.35%
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 SD-WAN Software allows local users with read-only credentials to execute root commands and read device files. The device CLI passes crafted command input without sufficient validation, allowing injected commands to run with root privileges. Exploitation requires an authenticated read-only CLI session; Cisco reports file disclosure but no file modification or service interruption for this CVE.

The record

CVE
CVE-2021-1262
Published
Jan 20, 2021
Updated
Sep 16, 2024
Vendor
ClamAV
Product
Cisco SD-WAN
Classifications
CWE-20, T1059
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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 SD-WANversion=n/a

Published CVSS scores

7.2NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
5.5CiscoCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.8NVDCVSS: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 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-20Improper Input Validation
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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