How severe is CVE-2020-5936?

CVE-2020-5936 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-5936 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5936?

CVE-2020-5936 affects F5 Big-ip Local Traffic Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5936?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-5936 published?

CVE-2020-5936 was published on 2020-10-29 and last updated on 2026-06-17.

CVE-2020-5936

CVE-2020-5936 is a high-severity vulnerability in F5 Big-ip Local Traffic Manager with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: F5 Big-ip Local Traffic Manager
Published: 2020-10-29
Last modified: 2026-06-17

Description

On BIG-IP LTM 15.1.0-15.1.0.5, 14.1.0-14.1.2.7, 13.1.0-13.1.3.4, and 12.1.0-12.1.5.1, the Traffic Management Microkernel (TMM) process may consume excessive resources when processing SSL traffic and client authentication are enabled on the client SSL profile.

Frequently asked questions

What is CVE-2020-5936?: On BIG-IP LTM 15.1.0-15.1.0.5, 14.1.0-14.1.2.7, 13.1.0-13.1.3.4, and 12.1.0-12.1.5.1, the Traffic Management Microkernel (TMM) process may consume excessive resources when processing SSL traffic and client authentication are enabled on the client SSL profile.
How severe is CVE-2020-5936?: CVE-2020-5936 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-5936 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5936?: CVE-2020-5936 affects F5 Big-ip Local Traffic Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5936?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-5936 published?: CVE-2020-5936 was published on 2020-10-29 and last updated on 2026-06-17.

References

https://support.f5.com/csp/article/K44020030

Affected products (1)

cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*

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