How severe is CVE-2024-21763?

CVE-2024-21763 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-2024-21763 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21763?

CVE-2024-21763 affects F5 Big-ip Advanced Firewall Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-21763?

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.

Does CVE-2024-21763 have an EU (EUVD) identifier?

Yes. CVE-2024-21763 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19377.

When was CVE-2024-21763 published?

CVE-2024-21763 was published on 2024-02-14 and last updated on 2026-06-17.

CVE-2024-21763

CVE-2024-21763 is a high-severity vulnerability in F5 Big-ip Advanced Firewall 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-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19377
Weakness: CWE-476
Affected product: F5 Big-ip Advanced Firewall Manager
Published: 2024-02-14
Last modified: 2026-06-17

Description

When BIG-IP AFM Device DoS or DoS profile is configured with NXDOMAIN attack vector and bad actor detection, undisclosed queries can cause the Traffic Management Microkernel (TMM) to terminate. NOTE: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Frequently asked questions

What is CVE-2024-21763?: When BIG-IP AFM Device DoS or DoS profile is configured with NXDOMAIN attack vector and bad actor detection, undisclosed queries can cause the Traffic Management Microkernel (TMM) to terminate. NOTE: Software versions which have reached End of Technical Support (EoTS) are not evaluated
How severe is CVE-2024-21763?: CVE-2024-21763 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-2024-21763 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21763?: CVE-2024-21763 affects F5 Big-ip Advanced Firewall Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-21763?: 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.
Does CVE-2024-21763 have an EU (EUVD) identifier?: Yes. CVE-2024-21763 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19377.
When was CVE-2024-21763 published?: CVE-2024-21763 was published on 2024-02-14 and last updated on 2026-06-17.

References

https://my.f5.com/manage/s/article/K000137521

Affected products (1)

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

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