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CVE-2020-5909

20
FAUCET Score

CVE-2020-5909 is a medium-severity vulnerability affecting NGINX Controller versions 1.0.1 through 3.5.0. It allows an attacker to intercept agent installer downloads due to a lack of server TLS certificate verification when users execute a command from the UI. This could lead to information disclosure or data tampering (CWE-295) with low impact on confidentiality and integrity. While the attack requires user interaction (UI:R) and is network-based (AV:N), there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, <= 2.9.0CPE matchmatch criteria
cpe:2.3:a:f5:nginx_controller:*:*:*:*:*:*:*:*
>= 3.0.0, <= 3.5.0CPE matchmatch criteria
cpe:2.3:a:f5:nginx_controller:*:*:*:*:*:*:*:*
1.0.1CPE matchmatch criteria
cpe:2.3:a:f5:nginx_controller:1.0.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 34th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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/K31150658
Vendor Advisory