CVE•Published 2026-02-10•Modified 2026-06-15•0 articles on news•6 live references•NVD data
CVE-2026-21527Microsoft · Exchange_server
Vulnerability data via NVD (ingested)
CVSS v3.1
6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS percentile
25
Exploit Prediction Scoring System · top 75% of all CVEs
Weaknesses (CWE)
Description
User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
Timeline
Published 2026-02-10
Modified 2026-06-15
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 tag2 hosts
vuln:CVE-2026-21527Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Microsoft Exchange Server" version:"2016"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-2026-21527Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-21527Censys host search filtered to this CVE id.
grep.app
CVE-2026-21527Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-21527GitHub code search for direct mentions.
Google dork
"CVE-2026-21527" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-21527 on GitHub.
We haven't classified any articles referencing CVE-2026-21527 yet. The external references above still apply.