No exploitation reported

CVE-2020-5852

No exploitation reported by the sources we read.

Published2020-01-14

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Undisclosed traffic patterns received may cause a disruption of service to the Traffic Management Microkernel (TMM). This vulnerability affects TMM through a virtual server configured with a FastL4 profile. Traffic processing is disrupted while TMM restarts. This issue only impacts specific engineering hotfixes. NOTE: This vulnerability does not affect any of the BIG-IP major, minor or maintenance releases you obtained from downloads.f5.com. The affected Engineering Hotfix builds are as follows: Hotfix-BIGIP-14.1.2.1.0.83.4-ENG Hotfix-BIGIP-12.1.4.1.0.97.6-ENG Hotfix-BIGIP-11.5.4.2.74.291-HF2

Timeline

dates in UTC

2020-01-1417:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-5852?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-5852?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

F5 big-ip access policy manager

Branch	Affected	Fixed in	Source
11.5	= 11.5.4.2.74.291	no fix published	NVD
12.1	= 12.1.4.1.0.97.6	no fix published	NVD
14.1	= 14.1.2.1.0.83.4	no fix published	NVD

F5 big-ip advanced firewall manager

Branch	Affected	Fixed in	Source
11.5	= 11.5.4.2.74.291	no fix published	NVD
12.1	= 12.1.4.1.0.97.6	no fix published	NVD
14.1	= 14.1.2.1.0.83.4	no fix published	NVD

F5 big-ip analytics

Branch	Affected	Fixed in	Source
11.5	= 11.5.4.2.74.291	no fix published	NVD
12.1	= 12.1.4.1.0.97.6	no fix published	NVD
14.1	= 14.1.2.1.0.83.4	no fix published	NVD

10 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

support.f5.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
FIRST EPSSEPSS score1.2 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2020-01-14
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-5852?

Is CVE-2020-5852 actively exploited?

Active exploitation of CVE-2020-5852 has not been confirmed. Its EPSS score was 1.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-5852?

CVE-2020-5852 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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