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CVE-2020-5852

21
FAUCET Score

CVE-2020-5852 describes a denial-of-service vulnerability affecting specific F5 BIG-IP engineering hotfixes. Undisclosed traffic patterns, when processed by a virtual server configured with a FastL4 profile, can cause the Traffic Management Microkernel (TMM) to restart, disrupting traffic processing. This vulnerability has a CVSS score of 7.5 (High), indicating it can be exploited remotely with low attack complexity, leading to high availability impact. There is no known active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
11.5.4.2.74.291CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:11.5.4.2.74.291:*:*:*:*:*:*:*
12.1.4.1.0.97.6CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:12.1.4.1.0.97.6:*:*:*:*:*:*:*
14.1.2.1.0.83.4CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:14.1.2.1.0.83.4:*:*:*:*:*:*:*
11.5.4.2.74.291CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:11.5.4.2.74.291:*:*:*:*:*:*:*
12.1.4.1.0.97.6CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:12.1.4.1.0.97.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
1.20%
Probability of exploitation in next 30 days
EPSS Percentile
65.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0120 is in the 44th percentile among its peer group of 51,551 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/K53590702
Vendor Advisory