CVE•Published 2026-09-17•Modified 2026-10-14•1 article on news•4 live references•NVD data
CVE-2026-78501Microsoft · 365_copilot_chat
Vulnerability data via NVD (ingested)
CVSS v3.1
8.6
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
EPSS percentile
39
Exploit Prediction Scoring System · top 61% of all CVEs
Weaknesses (CWE)
Description
Improper neutralization of special elements used in a command ('command injection') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to disclose information over a network.
Timeline
Published 2026-09-17
Modified 2026-10-14
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).
Shodan · vuln tag0 hosts
vuln:CVE-2026-78501Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Microsoft 365 Copilot Chat"All exposed Microsoft 365 Copilot Chat instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"365 Copilot Chat"HTTP body or banner mentions "365 Copilot Chat" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-78501Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-78501Censys host search filtered to this CVE id.
grep.app
CVE-2026-78501Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-78501GitHub code search for direct mentions.
Google dork
"CVE-2026-78501" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-78501 on GitHub.