Cybersecurity Rating
by ImmuniWeb® CyberScore™

Hostname	URL	Grade	Tested on
tenable.com	https://www.tenable.com/	C	November 6th, 2026 18:23
assess.tenable.com	https://assess.tenable.com/	A	November 6th, 2026 18:25
exchange.tenable.com	https://exchange.tenable.com/	C	November 6th, 2026 18:24
data.ot-telemetry.tenable.com	https://data.ot-telemetry.tenable.com/	A	November 6th, 2026 18:24
docs.tenable.com	https://docs.tenable.com/	C	November 6th, 2026 18:28

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Website Privacy Rating | Overview

The total number of subdomains is capped at 50.

Hostname	URL	Grade	Tested on
tenable.com	https://tenable.com	N	November 6th, 2026 19:16
www.tenable.com	https://www.tenable.com	N	November 6th, 2026 19:16
assess.tenable.com	https://assess.tenable.com	N	November 6th, 2026 19:16
exchange.tenable.com	https://exchange.tenable.com/	A+	November 6th, 2026 19:16
data.ot-telemetry.tenable.com	https://data.ot-telemetry.tenable.com/	A+	November 6th, 2026 19:16

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The total number of subdomains is capped at 50.

Hostname	URL	Protocol	Grade	Tested on
tenable.com	https://tenable.com 54.159.189.155:443	HTTPS	A+	November 6th, 2026 18:22
www.tenable.com	https://www.tenable.com 104.16.49.5:443	HTTPS	A+	November 6th, 2026 18:22
assess.tenable.com	https://assess.tenable.com 104.18.30.111:443	HTTPS	A	November 6th, 2026 18:24
exchange.tenable.com	https://exchange.tenable.com 104.16.48.5:443	HTTPS	A	November 6th, 2026 18:25
data.ot-telemetry.tenable.com	https://data.ot-telemetry.tenable.com 34.107.204.85:443	HTTPS	A+	November 6th, 2026 18:24

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Hostname	Grade	Tested on
tenable.com	A-	November 6th, 2026 18:24

Email Server Security Report
A total of 12 email servers were analyzed. Open relay was not detected, SMTP enumeration was not detected, a secure authentication was enforced across all tested servers, and PTR records were properly configured. The average response latency was approximately 0.015s.
Email SSL/TLS Encryption Report
SSL/TLS security testing was completed for 12 email servers. The worst grade across the tested servers is B+.
Email Server DNS Security Report
SPF is set properly, DKIM is set properly, and DMARC is set properly. MTA-STS is not configured for this domain.
Email Server Black and Spam Lists Report
6 of 12 email servers were listed on one or more blacklists, with up to 1 blacklist listing detected for a single server.

2 websites with vibe-coded or AI-created code patterns detected across 51 websites.
No leaks of AI tokens or other AI-related and sensitive data detected on the Dark Web.
No leaks of AI tokens or other AI-related and sensitive data detected across 51 websites.

Hostname	Tested on
tenable.com	November 6th, 2026 18:21

Dark Web Exposure Report
No dark web incidents found.
Unprotected Cloud Storage Report
No cloud storage buckets found.
Phishing Websites Report
4 potential phishing URLs detected. Example hostnames: tenable-solutions.blogspot.com and tenable.kz; the full list is available in the detailed report.
Cybersquatting Domains Report
30 potential cybersquatting domains detected. Example domains: tenable.latabernadelmartillo.com, tunablu.com and tenablesolutions.com; additional cybersquatting domains are available in the detailed report.
Typosquatting Domains Report
3 potential typosquatting domains detected. Example domains: tenagle.com, renable.com and zenable.com.
Fake Accounts in Social Media Report
33 squatted social network accounts detected across 5 social networks. Most affected social networks include Reddit with 12 accounts including @tenablecm and @tenablejm, YouTube with 9 accounts including @tenableai and @tenable2009 and WordPress with 5 accounts including tenableblog.wordpress.com and tenableindia.wordpress.com; the full list is available in the detailed report.

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