CVE•Published 2021-07-14•Modified 2026-08-10•1 article on news•5 live references•NVD data
CVE-2021-33766Microsoft · Exchange_server
Vulnerability data via NVD (ingested)
CVSS v3.1
7.3
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS percentile
100
Exploit Prediction Scoring System · top 0% of all CVEs
Description
Microsoft Exchange Server Information Disclosure Vulnerability
Timeline
Published 2021-07-14
Modified 2026-08-10
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2021-33766Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Microsoft Exchange Server" version:"2013"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:"Exchange Server"HTTP body or banner mentions "Exchange Server" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-33766Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-33766Censys host search filtered to this CVE id.
grep.app
CVE-2021-33766Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-33766GitHub code search for direct mentions.
Google dork
"CVE-2021-33766" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.