CVE-2021-23014Network attack vector

Authenticated file upload via missing authorization checks

Published May 10, 2021 · Updated Aug 3, 2024

Missing authorization in F5 BIG-IP Advanced WAF and ASM 14.1.x, 15.1.x, and 16.0.x allows remote authenticated users to upload files. The REST API live-update upload path accepts a guest user's file for a specific directory without verifying authorization to write there. A valid guest account and network access to the REST API are required; public records establish an unauthorized file write but do not describe subsequent execution.

CVSS severity8.8
High
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in F5 BIG-IP Advanced WAF and ASM 14.1.x, 15.1.x, and 16.0.x allows remote authenticated users to upload files. The REST API live-update upload path accepts a guest user's file for a specific directory without verifying authorization to write there. A valid guest account and network access to the REST API are required; public records establish an unauthorized file write but do not describe subsequent execution.

The record

CVE
CVE-2021-23014
Published
May 10, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 10, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1105Ingress Tool Transfer

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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