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CVE-2026-41218

BIG-IP PEM iRules vulnerability

When BIG-IP PEM iRules are configured on a virtual server (iRules using commands starting with CLASSIFICATION::, CLASSIFY::, PEM::, PSC::, and the urlcatquery command), undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 19 more
CVE-2026-40701

NGINX ngx_http_ssl_module vulnerability

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssl_module module when the ssl_verify_client directive is set to "on" or "optional," and the ssl_ocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
F5
Products
Dos Nginx Gateway Fabric Nginx Ingress Controller and 4 more
CVE-2026-42926

NGINX ngx_http_proxy_v2_module vulnerability

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version to 2, and also uses proxy_set_body, an attacker may be able to inject frame headers and payload bytes to the upstream peer.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
F5
Products
Nginx Gateway Fabric Nginx Ingress Controller Nginx Instance Manager and 1 more
CVE-2026-42063

iControl SOAP vulnerability

A vulnerability exists in iControl SOAP where an authenticated attacker with the Resource Administrator or Administrator role can download sensitive files.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 19 more
CVE-2026-40699

BIG-IP Configuration utility vulnerability

A vulnerability exists in the undisclosed pages in the Configuration utility that may allow a low-privileged authenticated attacker to access to undisclosed sensitive information.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 19 more
CVE-2026-40631

BIG-IP iControl SOAP vulnerability

An authenticated attacker with the Resource Administrator or Administrator role can modify configuration objects through iControl SOAP resulting in privilege escalation.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 19 more
CVE-2026-41217

BIG-IP tmsh vulnerability

A vulnerability exists in an undisclosed BIG-IP TMOS Shell (tmsh) command that may allow an authenticated attacker with resource administrator or administrator role to execute arbitrary system commands with higher privileges. In Appliance mode deployments, a successful exploit can allow the attacker to cross a security boundary. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 19 more
CVE-2026-40462

iControl REST and tmsh vulnerability

Incorrect permission assignment vulnerabilities exist in iControl REST and TMOS shell (tmsh) undisclosed command which may allow an authenticated attacker to view sensitive information.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 19 more
CVE-2026-42924

BIG-IP iControl SOAP vulnerability

An authenticated attacker with the Resource Administrator or Administrator role can create SNMP configuration objects through iControl SOAP resulting in privilege escalation.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 19 more
CVE-2026-42937

iControl REST and tmsh vulnerability

Incorrect permission assignment vulnerabilities exist in BIG-IP and BIG-IQ TMOS Shell (tmsh) arp and ndp commands, and in BIG-IP iControl REST. These vulnerabilities may allow an authenticated attacker to view adjacent network information.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 6.8 Medium EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 20 more
CVE-2026-42406

BIG-IP and BIG-IQ privilege escalation vulnerability

A vulnerability exists in BIG-IP and BIG-IQ systems where a highly privileged, authenticated attacker with at least the Certificate Manager role can modify configuration objects that allow running arbitrary commands.     Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 21 more
CVE-2026-42930

Appliance mode iControl REST vulnerability

When running in Appliance mode, an authenticated attacker assigned the 'Administrator' role may be able to bypass Appliance mode restrictions on a BIG-IP system.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 19 more
CVE-2026-42934

NGINX ngx_http_charset_module vulnerability

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When charset, source_charset, and charset_map and proxy_pass with disabled buffering ("off") directives are configured, unauthenticated attackers can send requests that with conditions beyond the attackers' control to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
F5
Products
Dos Nginx Gateway Fabric Nginx Ingress Controller and 4 more
CVE-2026-40435

BIG-IP httpd access control vulnerability

When configured, IP-based access restrictions for httpd do not cover all endpoints, which may allow connections from blocked addresses.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 19 more
CVE-2026-42408

BIG-IP DNS tmsh vulnerability

When BIG-IP DNS is provisioned, a vulnerability exists in an undisclosed TMOS Shell (tmsh) command that may allow a highly privileged authenticated attacker to view sensitive information.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 6.7 Medium EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 19 more
CVE-2026-42919

F5 BIG-IP Appliance Mode Vulnerability

A vulnerability exists in BIG-IP systems that may allow an authenticated attacker with administrative access to escalate their privileges. A successful exploit may allow the attacker to cross a security boundary.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 19 more
CVE-2026-40061

iControl REST and tmsh vulnerability

When BIG-IP DNS is provisioned, a vulnerability exists in an undisclosed iControl REST and BIG-IP TMOS Shell (tmsh) command that may allow an authenticated attacker with the Resource Administrator or Administrator role to execute arbitrary system commands with higher privileges. In Appliance mode deployments, a successful exploit can allow the attacker to cross a security boundary.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Domain Name System
CVE-2026-28758

BIG-IP iControl REST vulnerability

When BIG-IP DNS is provisioned, a vulnerability exists in the gtm_add and bigip_add iControl REST commands that return the ssh-password parameter in cleartext in the iControl REST response and is also logged in the audit log. This may allow a highly privileged, authenticated attacker with access to the audit log to view sensitive information.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

CVSS 4.0 · 6.7 Medium EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Domain Name System
CVE-2026-41219

BIG-IP QKView vulnerability

An improper sanitization vulnerability exists in the BIG-IP QKView utility that allows a low-privileged attacker to read sensitive information from a QKView file.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
F5
Products
Big-ip Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 21 more