CVE•Published 2026-07-24•Modified 2026-07-29•1 article on news•4 live references•NVD data
CVE-2026-50517Microsoft · 365_copilot
Vulnerability data via NVD (ingested)
CVSS v3.1
9.9
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS percentile
66
Exploit Prediction Scoring System · top 34% of all CVEs
Weaknesses (CWE)
Description
Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.
Timeline
Published 2026-07-24
Modified 2026-07-29
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-2026-50517Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Microsoft 365 Copilot"All exposed Microsoft 365 Copilot instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"365 Copilot"HTTP body or banner mentions "365 Copilot" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-50517Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-50517Censys host search filtered to this CVE id.
grep.app
CVE-2026-50517Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-50517GitHub code search for direct mentions.
Google dork
"CVE-2026-50517" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-50517 on GitHub.