CVE-2022-35236Network attack vector

Unauthenticated memory-resource exhaustion

Published Aug 4, 2022 · Updated Sep 17, 2024

Resource exhaustion in affected F5 BIG-IP 14.1.x, 15.1.x, and 16.1.x releases allows remote attackers to increase memory use. With an HTTP2 profile configured on a virtual server, undisclosed traffic drives uncontrolled memory-resource consumption. No authentication or user interaction is required, and F5 has not disclosed the triggering traffic pattern or whether resource pressure culminates in a hang, crash, or restart.

CVSS severity7.5
High
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in affected F5 BIG-IP 14.1.x, 15.1.x, and 16.1.x releases allows remote attackers to increase memory use. With an HTTP2 profile configured on a virtual server, undisclosed traffic drives uncontrolled memory-resource consumption. No authentication or user interaction is required, and F5 has not disclosed the triggering traffic pattern or whether resource pressure culminates in a hang, crash, or restart.

The record

CVE
CVE-2022-35236
Published
Aug 4, 2022
Updated
Sep 17, 2024
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=14.1.x <14.1.5
  2. Affected versionversion=15.1.x <15.1.6.1
  3. Affected versionversion=16.1.x <16.1.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IPversion=14.1.x <14.1.5; version=15.1.x <15.1.6.1; version=16.1.x <16.1.2.2

Published CVSS scores

7.5F5 NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

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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