What’s Vulnerable › Vulnerabilities

CVE-2018-5507

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-04-13 · updated 2026-06-17

Description

On F5 BIG-IP versions 13.0.0, 12.1.0-12.1.3.1, 11.6.1-11.6.2, or 11.5.1-11.5.5, vCMP guests running on VIPRION 2100, 4200 and 4300 series blades cannot correctly decrypt ciphertext from established SSL sessions with small MTU.

Affected products

• F5 BIG-IP APM: from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• BIG-IP: from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• F5 Big-Ip Analytics: from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• F5 Networks, Inc. BIG-IP (AAM): from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• BIG-IP ASM: from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• F5 BIG-IP DNS: from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• F5 Big-Ip Edge Gateway: from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• F5 Big-Ip Global Traffic Manager: from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• F5 Big-Ip Link Controller: from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• F5 BIG-IP (LTM): from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• F5 Networks, Inc. BIG-IP (PEM): from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• F5 Big-Ip Webaccelerator: from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0
• F5 Big-Ip Websafe: from 11.5.1 through 11.5.5; from 11.6.1 through 11.6.2; from 12.1.0 through 12.1.3; 13.0.0

References

• https://support.f5.com/csp/article/K52521791
• https://support.f5.com/csp/article/K52521791

Get alerted when CVE-2018-5507 or the next vulnerability affects your stack