How severe is CVE-2016-7476?

CVE-2016-7476 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-2016-7476 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-7476?

CVE-2016-7476 primarily affects F5 Big-ip Websafe. In total, 68 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-7476?

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-2016-7476 published?

CVE-2016-7476 was published on 2017-05-11 and last updated on 2026-06-17.

CVE-2016-7476

CVE-2016-7476 is a high-severity vulnerability in F5 Big-ip Websafe 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: F5 Big-ip Websafe
Published: 2017-05-11
Last modified: 2026-06-17

Description

The Traffic Management Microkernel (TMM) in F5 BIG-IP LTM, AAM, AFM, APM, ASM, GTM, Link Controller, PEM, PSM, and WebSafe 11.6.0 before 11.6.0 HF6, 11.5.0 before 11.5.3 HF2, and 11.3.0 before 11.4.1 HF10 may suffer from a memory leak while handling certain types of TCP traffic. Remote attackers may cause a denial of service (DoS) by way of a crafted TCP packet.

Frequently asked questions

What is CVE-2016-7476?: The Traffic Management Microkernel (TMM) in F5 BIG-IP LTM, AAM, AFM, APM, ASM, GTM, Link Controller, PEM, PSM, and WebSafe 11.6.0 before 11.6.0 HF6, 11.5.0 before 11.5.3 HF2, and 11.3.0 before 11.4.1 HF10 may suffer from a memory leak while handling certain types of TCP traffic. Remote attackers may cause a denial of service (DoS) by way of a crafted TCP packet.
How severe is CVE-2016-7476?: CVE-2016-7476 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-2016-7476 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-7476?: CVE-2016-7476 primarily affects F5 Big-ip Websafe. In total, 68 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-7476?: 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-2016-7476 published?: CVE-2016-7476 was published on 2017-05-11 and last updated on 2026-06-17.

References

Affected products (68)

cpe:2.3:a:f5:big-ip_websafe:11.6.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_protocol_security_module:11.3.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_protocol_security_module:11.4.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_protocol_security_module:11.4.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:11.3.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:11.4.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:11.4.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:11.5.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:11.5.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:11.5.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:11.5.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:11.6.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_link_controller:11.3.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_link_controller:11.4.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_link_controller:11.4.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_link_controller:11.5.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_link_controller:11.5.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_link_controller:11.5.2:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_link_controller:11.5.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_link_controller:11.6.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_global_traffic_manager:11.3.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_global_traffic_manager:11.4.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_global_traffic_manager:11.4.1:*:*:*:*:*:*:*
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-ip_application_security_manager:11.3.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_security_manager:11.4.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_security_manager:11.4.1:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_security_manager:11.5.3:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_security_manager:11.6.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:11.3.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:11.4.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:11.4.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:11.5.0:*:*:*:*:*:*:*

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