CVE•Published 2026-02-10•1 article on news•5 live references•NVD data
CVE-2026-21537
Vulnerability data via CVEDB (Shodan)
CVSS v3.1
8.8
HIGH
EPSS percentile
41
Exploit Prediction Scoring System · top 59% of all CVEs
Description
Improper control of generation of code ('code injection') in Microsoft Defender for Linux allows an unauthorized attacker to execute code over an adjacent network.
Timeline
Published 2026-02-10
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-2026-21537Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Microsoft Defender For Endpoint"All exposed Microsoft Defender For Endpoint instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Defender For Endpoint"HTTP body or banner mentions "Defender For Endpoint" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-21537Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-21537Censys host search filtered to this CVE id.
grep.app
CVE-2026-21537Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-21537GitHub code search for direct mentions.
Google dork
"CVE-2026-21537" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-21537 on GitHub.