VulnSocial

CVE-2026-40618Disclosure(f5 / big-ip_access_policy_manager)

LOWCVSS 8.7 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

When an SSL profile is configured on a virtual server on BIG-IP Virtual Edition (VE) without Intel QuickAssist Technology (QAT) or on BIG-IP hardware platforms with the database variable crypto.hwacceleration set to disabled, 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.

f5 CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-131

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • big-ip_access_policy_manager
  • big-ip_advanced_firewall_manager
  • big-ip_advanced_web_application_firewall
  • big-ip_analytics

Threat summary

  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • General: 1 classified signal
  • Peaked 2d ago at 1 mentions (2026-05-13); latest day: 1
  • 3 total mentions across 3 days

Affected systems

Vendors
f5
Products
big-ip_access_policy_managerbig-ip_advanced_firewall_managerbig-ip_advanced_web_application_firewallbig-ip_analyticsbig-ip_application_acceleration_managerbig-ip_application_security_managerbig-ip_application_visibility_and_reportingbig-ip_automation_toolchainbig-ip_carrier-grade_natbig-ip_container_ingress_services

1 version affected across 24 products

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-05-13: 1Mentions · 2026-05-14: 1Mentions · 2026-05-17: 1Technical Details · 2026-05-13: 1Technical Details · 2026-05-17: 105-1305-1405-17
Signal classification2 categories
Disclosure
266.7%
General
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-05-131
Disclosure1
2026-05-141
General1
2026-05-171
Disclosure1
Full discourse3 posts
  • Israel@f1tym1
    Disclosure

    CVE-2026-40618 | F5 BIG-IP prior 17.1.3.1/17.1.5.4/21.0.0.1 Traffic Management Microkernel buffer size (K000158082 / WID-SEC-2026-1532) https://ift.tt/JW8ha39 A vulnerability was found in F5 BIG-IP, BIG-IP Next SPK, BIG-IP Next CNF and BIG-IP Next for Kubernetes. It has been r…

    Post summary

    A new vulnerability, CVE-2026-40618, affecting F5 BIG‑IP versions prior to 17.1.3.1/17.1.5.4/21.0.0.1 is disclosed, detailing a buffer size issue in the Traffic Management Microkernel and providing a link for more information.

    0000038
    974 followersView on X
  • VulDB 🛡@vuldb
    General

    We have just added an important vulnerability affecting F5 BIG-IP and other products (CVE-2026-40618) https://vuldb.com/vuln/363560

    Post summary

    The post announces CVE-2026-40618 affecting F5 BIG‑IP and links to a database, but provides no further technical, exploit, or mitigation information.

    0000086
    2.2K followersView on X
  • Kaitan ID Security@KaitanSecurity
    Disclosure

    ⚠️ HIGH — CVE-2026-40618 When an SSL profile is configured on a virtual server on BIG-IP Virtual Edition (VE) without Intel QuickAssist Technolo… CVSS 7.5 Full analysis → https://sec.kaitan.id/cves/CVE-2026-40618 #Intel #CyberSecurity #InfoSec

    Post summary

    The post announces CVE-2026-40618, a high‑severity vulnerability (CVSS 7.5) affecting BIG‑IP Virtual Edition when an SSL profile is configured without Intel QuickAssist technology, with a link to a detailed analysis.

    0000072
    90 followersView on X
CPE platform detail45 entries

45 of 45 entries

PartVendorProductVersionTarget SWTarget HW
Appf5big-ip_access_policy_manager---
Appf5big-ip_access_policy_manager21.0.0--
Appf5big-ip_advanced_firewall_manager---
Appf5big-ip_advanced_firewall_manager21.0.0--
Appf5big-ip_advanced_web_application_firewall---
Appf5big-ip_advanced_web_application_firewall21.0.0--
Appf5big-ip_analytics---
Appf5big-ip_analytics21.0.0--
Appf5big-ip_application_acceleration_manager---
Appf5big-ip_application_acceleration_manager21.0.0--
Appf5big-ip_application_security_manager---
Appf5big-ip_application_security_manager21.0.0--
Appf5big-ip_application_visibility_and_reporting---
Appf5big-ip_application_visibility_and_reporting21.0.0--
Appf5big-ip_automation_toolchain---
Appf5big-ip_automation_toolchain21.0.0--
Appf5big-ip_carrier-grade_nat---
Appf5big-ip_carrier-grade_nat21.0.0--
Appf5big-ip_container_ingress_services---
Appf5big-ip_container_ingress_services21.0.0--
Appf5big-ip_ddos_hybrid_defender---
Appf5big-ip_ddos_hybrid_defender21.0.0--
Appf5big-ip_domain_name_system---
Appf5big-ip_domain_name_system21.0.0--
Appf5big-ip_edge_gateway---
Appf5big-ip_edge_gateway21.0.0--
Appf5big-ip_fraud_protection_service---
Appf5big-ip_fraud_protection_service21.0.0--
Appf5big-ip_global_traffic_manager---
Appf5big-ip_global_traffic_manager21.0.0--
Appf5big-ip_link_controller---
Appf5big-ip_link_controller21.0.0--
Appf5big-ip_local_traffic_manager---
Appf5big-ip_local_traffic_manager21.0.0--
Appf5big-ip_next_cloud-native_network_functions---
Appf5big-ip_next_for_kubernetes---
Appf5big-ip_next_service_proxy_for_kubernetes---
Appf5big-ip_policy_enforcement_manager---
Appf5big-ip_policy_enforcement_manager21.0.0--
Appf5big-ip_ssl_orchestrator---
Appf5big-ip_ssl_orchestrator21.0.0--
Appf5big-ip_webaccelerator---
Appf5big-ip_webaccelerator21.0.0--
Appf5big-ip_websafe---
Appf5big-ip_websafe21.0.0--

Explore more

Back to dashboardf5 CVEsbig-ip_access_policy_manager vulnerabilities