CVE•Published 2023-02-14•Modified 2026-04-14•1 article on news•6 live references•NVD data
CVE-2023-21529Microsoft · Exchange_server
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
97
Exploit Prediction Scoring System · top 3% of all CVEs
Weaknesses (CWE)
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Timeline
Published 2023-02-14
Modified 2026-04-14
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). Live host counts are a Premium feature.
Shodan · vuln tag
vuln:CVE-2023-21529Hosts 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-2023-21529Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2023-21529Censys host search filtered to this CVE id.
grep.app
CVE-2023-21529Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2023-21529GitHub code search for direct mentions.
Google dork
"CVE-2023-21529" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2023-21529 on GitHub.