VulnerabilityModified

CVE-2018-5527

HIGH 7.5EPSS 2.54%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.54%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

On BIG-IP 13.1.0-13.1.0.7, a remote attacker using undisclosed methods against virtual servers configured with a Client SSL or Server SSL profile that has the SSL Forward Proxy feature enabled can force the Traffic Management Microkernel (tmm) to leak memory. As a result, system memory usage increases over time, which may eventually cause a decrease in performance or a system reboot due to memory exhaustion.

CVSS 3.0: 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 2.54% probability · 85th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-772
Affected: f5/big-ip access policy manager · f5/big-ip advanced firewall manager · f5/big-ip analytics · f5/big-ip application acceleration manager · f5/big-ip application security manager · f5/big-ip domain name system · f5/big-ip edge gateway · f5/big-ip global traffic manager · f5/big-ip link controller · f5/big-ip local traffic manager · f5/big-ip policy enforcement manager · f5/big-ip webaccelerator · f5/big-ip websafe
Source: f5sirt@f5.com

EPSS trend

EPSS 2.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

http://www.securitytracker.com/id/1041196Third Party Advisory, VDB Entry
https://support.f5.com/csp/article/K20134942Vendor Advisory
http://www.securitytracker.com/id/1041196Third Party Advisory, VDB Entry
https://support.f5.com/csp/article/K20134942Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.