AEGLIX vulnerability intelligence
CVE-2021-22991
CRITICAL · CVSS 9.8 · Analyzed
Published: 2021-03-31 · Updated: 2026-06-17 · Source: NVD
Continue your research
Connect this record to stored reporting, reviewed campaign mentions and source-domain investigation. These are research leads, not inferred attack relationships.
Open CVE research in Investigate · Find Arsenal listings referencing this CVE
Vulnerability overview
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 12.1.x before 12.1.5.3, undisclosed requests to a virtual server may be incorrectly handled by the Traffic Management Microkernel (TMM) URI normalization, which may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may theoretically allow bypass of URL based access control or remote code execution (RCE). Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
Severity and scoring
- CVSS score
- 9.8 · CRITICAL
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-119
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- F5 · BIG-IP Traffic Management Microkernel
- Added to catalog
- 2022-01-18
- Required action
- Apply updates per vendor instructions.
- CISA remediation due date
- 2022-02-01
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
cpe:2.3:a:f5:ssl_orchestrator:*:*:*:*:*:*:*:*
From (inclusive): 12.1.0
Before (exclusive): 12.1.5.3
cpe:2.3:a:f5:ssl_orchestrator:*:*:*:*:*:*:*:*
From (inclusive): 13.1.0
Before (exclusive): 13.1.3.6
cpe:2.3:a:f5:ssl_orchestrator:*:*:*:*:*:*:*:*
From (inclusive): 14.1.0
Before (exclusive): 14.1.4
cpe:2.3:a:f5:ssl_orchestrator:*:*:*:*:*:*:*:*
From (inclusive): 15.1.0
Before (exclusive): 15.1.2.1
cpe:2.3:a:f5:ssl_orchestrator:*:*:*:*:*:*:*:*
From (inclusive): 16.0.0
Before (exclusive): 16.0.1.1
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://support.f5.com/csp/article/K56715231
Vendor Advisory
- https://support.f5.com/csp/article/K56715231
Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22991
US Government Resource