CVE-2022-27182Network attack vector

Service interruption via packet-filter memory exhaustion

Published May 5, 2022 · Updated Sep 16, 2024

Resource-consumption flaw in F5 BIG-IP allows remote attackers to increase memory use through requests to Reject virtual servers. F5 has not disclosed how the packet-filter Reject path processes the triggering requests or why memory use rises. Exposure requires enabled packet filters and a Reject-type virtual server, and the documented effect is resource consumption that interrupts service rather than data access or modification.

CVSS severity5.3
Medium
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource-consumption flaw in F5 BIG-IP allows remote attackers to increase memory use through requests to Reject virtual servers. F5 has not disclosed how the packet-filter Reject path processes the triggering requests or why memory use rises. Exposure requires enabled packet filters and a Reject-type virtual server, and the documented effect is resource consumption that interrupts service rather than data access or modification.

The record

CVE
CVE-2022-27182
Published
May 5, 2022
Updated
Sep 16, 2024
Vendor
F5 Networks
Product
BIG-IP
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 5, 2022CVE 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=14.1.x <14.1.4.6
  2. Affected versionversion=15.1.x <15.1.5.1
  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 <14.1.4.6; version=15.1.x <15.1.5.1; version=16.1.x <16.1.2.2

Published CVSS scores

5.3F5 NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/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
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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