CVE-2022-36795Network attack vector

Unauthenticated interruption of new client connections

Published Oct 19, 2022 · Updated May 8, 2025

Denial of service in F5 BIG-IP allows remote attackers to stop affected virtual servers from accepting new client connections. F5 identifies the locus as TMM SYN-cookie processing and an incorrect calculation, but has not disclosed the traffic pattern or erroneous operation. Exposure requires an affected release and a virtual server using an LTM TCP profile with Auto Receive Window enabled; successful traffic blocks new connections without reported data disclosure or modification.

CVSS severity5.3
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in F5 BIG-IP allows remote attackers to stop affected virtual servers from accepting new client connections. F5 identifies the locus as TMM SYN-cookie processing and an incorrect calculation, but has not disclosed the traffic pattern or erroneous operation. Exposure requires an affected release and a virtual server using an LTM TCP profile with Auto Receive Window enabled; successful traffic blocks new connections without reported data disclosure or modification.

The record

CVE
CVE-2022-36795
Published
Oct 19, 2022
Updated
May 8, 2025
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-682, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 19, 2022CVE publishedPublication date reported by the CVE source.
  2. May 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=14.1.x <14.1.5.1
  2. Affected versionversion=15.1.x <15.1.7
  3. Affected versionversion=16.1.x <16.1.3.1
  4. Affected versionversion=17.0.x <17.0.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

F5 Networks · BIG-IPversion=14.1.x <14.1.5.1; version=15.1.x <15.1.7; version=16.1.x <16.1.3.1; version=17.0.x <17.0.0.1

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.3F5 NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-682Incorrect Calculation
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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