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CVE-2018-5527

25
FAUCET Score

CVE-2018-5527 describes a memory leak vulnerability in F5 BIG-IP versions 13.1.0-13.1.0.7 when virtual servers are configured with Client SSL or Server SSL profiles and the SSL Forward Proxy feature is enabled. A remote attacker can exploit this with undisclosed methods, leading to increasing memory usage and potential system performance degradation or reboots due to exhaustion. This vulnerability is rated High severity (CVSS 7.5) due to its network attack vector, low complexity, and high impact on availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 13.0.0, <= 13.1.0.7CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
>= 13.0.0, <= 13.1.0.7CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
>= 13.0.0, <= 13.1.0.7CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
>= 13.0.0, <= 13.1.0.7CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
>= 13.0.0, <= 13.1.0.7CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.58%
Probability of exploitation in next 30 days
EPSS Percentile
83.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0258 is in the 71st percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.f5.com / csp/article/K20134942
Vendor Advisory
securitytracker.com / id/1041196
Third Party AdvisoryVDB Entry