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CVE-2018-5537

19
FAUCET Score

CVE-2018-5537 is a medium-severity vulnerability affecting F5 BIG-IP products across several versions (11.2.1-13.1.0.5) when a TMM virtual server is configured with an HTML or Rewrite profile. A remote attacker can disrupt services by causing the Traffic Management Microkernel (TMM) to restart through specially crafted HTML content from the backend. The attack complexity is high, requiring user interaction, but can lead to a denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 11.2.1, <= 11.5.6CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
>= 11.6.0, <= 11.6.3.1CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
>= 12.1.0, <= 12.1.3.5CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
>= 13.0.0, <= 13.1.0.5CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
>= 11.2.1, <= 11.5.6CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 78th percentile among its peer group of 707 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.2 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 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/K94105051
Vendor Advisory