How severe is CVE-2019-6688?

CVE-2019-6688 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2019-6688 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-6688?

CVE-2019-6688 primarily affects F5 Big-iq Centralized Management. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-6688?

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

When was CVE-2019-6688 published?

CVE-2019-6688 was published on 2019-12-23 and last updated on 2026-06-17.

CVE-2019-6688

CVE-2019-6688 is a medium-severity vulnerability in F5 Big-iq Centralized Management with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: F5 Big-iq Centralized Management
Published: 2019-12-23
Last modified: 2026-06-17

Description

On BIG-IP versions 15.0.0-15.0.1.1, 14.1.0-14.1.2.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, 12.1.0-12.1.5, and 11.5.2-11.6.5 and BIG-IQ versions 6.0.0-6.1.0 and 5.2.0-5.4.0, a user is able to obtain the secret that was being used to encrypt a BIG-IP UCS backup file while sending SNMP query to the BIG-IP or BIG-IQ system, however the user can not access to the UCS files.

Frequently asked questions

What is CVE-2019-6688?: On BIG-IP versions 15.0.0-15.0.1.1, 14.1.0-14.1.2.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, 12.1.0-12.1.5, and 11.5.2-11.6.5 and BIG-IQ versions 6.0.0-6.1.0 and 5.2.0-5.4.0, a user is able to obtain the secret that was being used to encrypt a BIG-IP UCS backup file while sending SNMP query to the BIG-IP or BIG-IQ system, however the user can not access to the UCS files.
How severe is CVE-2019-6688?: CVE-2019-6688 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2019-6688 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-6688?: CVE-2019-6688 primarily affects F5 Big-iq Centralized Management. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-6688?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-6688 published?: CVE-2019-6688 was published on 2019-12-23 and last updated on 2026-06-17.

References

https://support.f5.com/csp/article/K25607522

Affected products (14)

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

More vulnerabilities in F5 Big-iq Centralized Management

CVE-2021-22986 — Critical (CVSS 9.8): On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and…
CVE-2020-5868 — Critical (CVSS 9.8): In BIG-IQ 6.0.0-7.0.0, a remote access vulnerability has been discovered that may allow a remote user to execute shell…
CVE-2016-5022 — Critical (CVSS 9.8): F5 BIG-IP LTM, Analytics, APM, ASM, and Link Controller 11.2.x before 11.2.1 HF16, 11.3.x, 11.4.x, 11.5.x before 11.5.4…
CVE-2019-6665 — Critical (CVSS 9.4): On BIG-IP ASM 15.0.0-15.0.1, 14.1.0-14.1.2, 14.0.0-14.0.1, and 13.1.0-13.1.3.1, BIG-IQ 6.0.0 and 5.2.0-5.4.0, iWorkflow…
CVE-2021-23005 — Critical (CVSS 9.1): On all 7.x and 6.x versions (fixed in 8.0.0), when using a Quorum device for BIG-IQ high availability (HA) for…
CVE-2020-5869 — Critical (CVSS 9.1): In BIG-IQ 5.2.0-7.0.0, high availability (HA) synchronization is not secure by TLS and may allow on-path attackers to…

All CVEs affecting F5 Big-iq Centralized Management →