CVE-2021-1227Network attack vector

Configuration takeover via insufficient NX-API CSRF protection

Published Feb 24, 2021 · Updated Nov 8, 2024

Cross-site request forgery in Cisco NX-OS Software allows remote attackers to view or modify device configuration through NX-API. NX-API accepts forged HTTP or HTTPS requests without sufficient CSRF protection, applying actions with the affected user's privilege level. Exploitation requires NX-API to be enabled and a user of that interface to follow a malicious link; the feature is disabled by default.

CVSS severity8.1
High
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Cisco NX-OS Software allows remote attackers to view or modify device configuration through NX-API. NX-API accepts forged HTTP or HTTPS requests without sufficient CSRF protection, applying actions with the affected user's privilege level. Exploitation requires NX-API to be enabled and a user of that interface to follow a malicious link; the feature is disabled by default.

The record

CVE
CVE-2021-1227
Published
Feb 24, 2021
Updated
Nov 8, 2024
Vendor
ClamAV
Product
Cisco NX-OS Software
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 24, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco NX-OS Softwareversion=n/a

Published CVSS scores

8.1CiscoCVSS:3.0/AV:N/AC:L/PR:N/UI:R/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)

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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