How severe is CVE-2016-5021?

CVE-2016-5021 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2016-5021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-5021?

CVE-2016-5021 primarily affects F5 Big-iq Application Delivery Controller. In total, 73 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-5021?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-5021 published?

CVE-2016-5021 was published on 2016-06-24 and last updated on 2026-06-17.

CVE-2016-5021

CVE-2016-5021 is a medium-severity vulnerability in F5 Big-iq Application Delivery Controller with a CVSS 3.x base score of 4.9. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
CVSS v2: 4.0
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: F5 Big-iq Application Delivery Controller
Published: 2016-06-24
Last modified: 2026-06-17

Description

The iControl REST service in F5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, Link Controller, and PEM 11.5.x before 11.5.4, 11.6.x before 11.6.1, and 12.x before 12.0.0 HF3; BIG-IP DNS 12.x before 12.0.0 HF3; BIG-IP GTM 11.5.x before 11.5.4 and 11.6.x before 11.6.1; BIG-IQ Cloud and Security 4.0.0 through 4.5.0; BIG-IQ Device 4.2.0 through 4.5.0; BIG-IQ ADC 4.5.0; BIG-IQ Centralized Management 4.6.0; and BIG-IQ Cloud and Orchestration 1.0.0 allows remote authenticated administrators to obtain sensitive information via unspecified vectors.

Frequently asked questions

What is CVE-2016-5021?: The iControl REST service in F5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, Link Controller, and PEM 11.5.x before 11.5.4, 11.6.x before 11.6.1, and 12.x before 12.0.0 HF3; BIG-IP DNS 12.x before 12.0.0 HF3; BIG-IP GTM 11.5.x before 11.5.4 and 11.6.x before 11.6.1; BIG-IQ Cloud and Security 4.0.0 through 4.5.0; BIG-IQ Device 4.2.0 through 4.5.0; BIG-IQ ADC 4.5.0; BIG-IQ Centralized Management 4.6.0; and BIG-IQ Cloud and Orchestration 1.0.0 allows remote authenticated administrators to obtain sensitive information via unspecified vectors.
How severe is CVE-2016-5021?: CVE-2016-5021 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2016-5021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-5021?: CVE-2016-5021 primarily affects F5 Big-iq Application Delivery Controller. In total, 73 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-5021?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-5021 published?: CVE-2016-5021 was published on 2016-06-24 and last updated on 2026-06-17.

References

Affected products (73)

cpe:2.3:a:f5:big-iq_application_delivery_controller:4.5.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_cloud_and_orchestration:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_acceleration_manager:11.5.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_acceleration_manager:11.5.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_acceleration_manager:11.5.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_acceleration_manager:11.5.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_acceleration_manager:11.6.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_acceleration_manager:12.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:11.5.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:11.5.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:11.5.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:11.5.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:11.6.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:12.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_local_traffic_manager:11.5.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_local_traffic_manager:11.5.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_local_traffic_manager:11.5.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_local_traffic_manager:11.5.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_local_traffic_manager:11.6.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_local_traffic_manager:12.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_global_traffic_manager:11.5.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_global_traffic_manager:11.5.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_global_traffic_manager:11.5.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_global_traffic_manager:11.5.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_global_traffic_manager:11.6.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_security:4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_security:4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_security:4.2.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_security:4.3.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_security:4.4.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_security:4.5.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_cloud:4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_cloud:4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_cloud:4.2.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_cloud:4.3.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_cloud:4.4.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_cloud:4.5.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_security_manager:11.5.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_security_manager:11.5.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_security_manager:11.5.2:*:*:*:*:*:*:*

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CVE-2015-8099 — Medium (CVSS 5.9): F5 BIG-IP LTM, AFM, Analytics, APM, ASM, Link Controller, and PEM 11.3.x, 11.4.x before 11.4.1 HF10, 11.5.x before…

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