How severe is CVE-2018-15328?

CVE-2018-15328 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-2018-15328 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-15328?

CVE-2018-15328 primarily affects F5 Big-ip Access Policy Manager. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-15328?

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-2018-15328 published?

CVE-2018-15328 was published on 2018-12-12 and last updated on 2026-06-17.

CVE-2018-15328

CVE-2018-15328 is a high-severity vulnerability in F5 Big-ip Access Policy 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-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: F5 Big-ip Access Policy Manager
Published: 2018-12-12
Last modified: 2026-06-17

Description

On BIG-IP 14.0.x, 13.x, 12.x, and 11.x, Enterprise Manager 3.1.1, BIG-IQ 6.x, 5.x, and 4.x, and iWorkflow 2.x, the passphrases for SNMPv3 users and trap destinations that are used for authentication and privacy are not handled by the BIG-IP system Secure Vault feature; they are written in the clear to the various configuration files.

Frequently asked questions

What is CVE-2018-15328?: On BIG-IP 14.0.x, 13.x, 12.x, and 11.x, Enterprise Manager 3.1.1, BIG-IQ 6.x, 5.x, and 4.x, and iWorkflow 2.x, the passphrases for SNMPv3 users and trap destinations that are used for authentication and privacy are not handled by the BIG-IP system Secure Vault feature; they are written in the clear to the various configuration files.
How severe is CVE-2018-15328?: CVE-2018-15328 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-2018-15328 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-15328?: CVE-2018-15328 primarily affects F5 Big-ip Access Policy Manager. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-15328?: 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-2018-15328 published?: CVE-2018-15328 was published on 2018-12-12 and last updated on 2026-06-17.

References

Affected products (30)

cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_access_policy_manager:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_analytics:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_acceleration_manager:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_application_security_manager:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_domain_name_system:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_edge_gateway:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_fraud_protection_service:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_global_traffic_manager:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_link_controller:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_local_traffic_manager:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_webaccelerator:14.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:enterprise_manager:3.1.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_centralized_management:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-iq_centralized_management:4.6.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:iworkflow:*:*:*:*:*:*:*:*

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