No exploitation reportedFix available

CVE-2020-5864

Q: Is CVE-2020-5864 actively exploited?

Active exploitation of CVE-2020-5864 has not been confirmed. Its EPSS score was 1.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-5864?

CVE-2020-5864 has a CVSS v3 base score of 7.4 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

No exploitation reported by the sources we read.

Published2020-04-23
Fixed in3.3.0
WeaknessCWE-295

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

In versions of NGINX Controller prior to 3.2.0, communication between NGINX Controller and NGINX Plus instances skip TLS verification by default.

Timeline

dates in UTC

2020-04-2319:15CVE 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-2020-5864?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-5864?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

F5 nginx controller

Branch	Affected	Fixed in	Source
3.x	≥ 3.0.0, < 3.3.0	3.3.0	NVD
2.x	≥ 2.0.0, ≤ 2.9.0	no fix published	NVD
1.0	= 1.0.1	no fix published	NVD

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

Fix

Update F5 nginx controller to 3.3.0

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 3.17.4read 2026-10-23
NVDCVSS 2.05.8read 2026-10-23
NVDweakness (CWE)CWE-295read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published: 2020-04-23
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-5864?

In versions of NGINX Controller prior to 3.2.0, communication between NGINX Controller and NGINX Plus instances skip TLS verification by default.

Is CVE-2020-5864 actively exploited?

Active exploitation of CVE-2020-5864 has not been confirmed. Its EPSS score was 1.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-5864?

CVE-2020-5864 has a CVSS v3 base score of 7.4 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

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