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Fencer Intel
high 7.5

CVE-2019-6611 json

When BIG-IP 14.0.0-14.1.0.1, 13.0.0-13.1.1.4, 12.1.0-12.1.4, 11.6.1-11.6.3.4, and 11.5.2-11.5.8 are processing certain rare data sequences…

published 7y ago modified 4mo ago also EUVD-2019-16170

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

When BIG-IP 14.0.0-14.1.0.1, 13.0.0-13.1.1.4, 12.1.0-12.1.4, 11.6.1-11.6.3.4, and 11.5.2-11.5.8 are processing certain rare data sequences occurring in PPTP VPN traffic, the BIG-IP system may execute incorrect logic. The TMM may restart and produce a core file as a result of this condition. The BIG-IP system provisioned with the CGNAT module and configured with a virtual server using a PPTP profile is exposed to this vulnerability.

Patch / fix

  • f5 big-ip_access_policy_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_advanced_firewall_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_application_acceleration_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_link_controller 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_policy_enforcement_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_webaccelerator 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_application_security_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_local_traffic_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_fraud_protection_service 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_global_traffic_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_analytics 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_edge_gateway 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
  • f5 big-ip_domain_name_system 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2

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Exploit prediction

1.77% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • F5 BIG-IP (LTM, AAM, AFM, Analytics, APM, ASM, DNS, Edge Gateway, FPS, GTM, Link Controller, PEM, WebAccelerator)

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.