How severe is CVE-2020-5879?

CVE-2020-5879 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 high, integrity none, and availability none.

Is CVE-2020-5879 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5879?

CVE-2020-5879 affects F5 Big-ip Application Security Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5879?

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-2020-5879 published?

CVE-2020-5879 was published on 2020-04-30 and last updated on 2026-06-17.

CVE-2020-5879

CVE-2020-5879 is a high-severity vulnerability in F5 Big-ip Application Security 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-319.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: F5 Big-ip Application Security Manager
Published: 2020-04-30
Last modified: 2026-06-17

Description

On BIG-IP ASM 11.6.1-11.6.5.1, under certain configurations, the BIG-IP system sends data plane traffic to back-end servers unencrypted, even when a Server SSL profile is applied.

Frequently asked questions

What is CVE-2020-5879?: On BIG-IP ASM 11.6.1-11.6.5.1, under certain configurations, the BIG-IP system sends data plane traffic to back-end servers unencrypted, even when a Server SSL profile is applied.
How severe is CVE-2020-5879?: CVE-2020-5879 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 high, integrity none, and availability none.
Is CVE-2020-5879 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5879?: CVE-2020-5879 affects F5 Big-ip Application Security Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5879?: 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-2020-5879 published?: CVE-2020-5879 was published on 2020-04-30 and last updated on 2026-06-17.

References

https://support.f5.com/csp/article/K88474783

Affected products (1)

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

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