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CVE•Published 2026-10-12•Modified 2026-10-16•0 articles on news•4 live references•NVD data

CVE-2026-21121

Vulnerability data via NVD (ingested)

CVSS v3.1
—
EPSS percentile
4
Exploit Prediction Scoring System · top 96% of all CVEs
Weaknesses (CWE)
CWE-280Improper Handling of Insufficient Permissions or Privileges
Description

Improper handling of insufficient permission in CmcCore prior to SMR Oct-2026 Release 1 allows local attackers to use the privileged APIs.

Timeline
Published 2026-10-12
Modified 2026-10-16

External references

NVDMITREExploit-DBVulnCheck

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-2026-21121
Hosts Shodan has explicitly fingerprinted as vulnerable.
More intel sources (5)
Shodan report
vuln:CVE-2026-21121
Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-21121
Censys host search filtered to this CVE id.
grep.app
CVE-2026-21121
Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-21121
GitHub code search for direct mentions.
Google dork
"CVE-2026-21121" exploit -site:nvd.nist.gov
Write-ups and news, NVD excluded.

Known PoCs on GitHub (1)

CVE-2026-211211 repo
Jspencer-SOC/SOC-Home-Lab-RDP-Brute-Forceunknown
Home SOC lab simulating an RDP brute force attack using Hydra, detected with Wazuh SIEM, and remediated live. Includes vulnerability scanning, CIS benchmarking, FIM, and threat hun…
★ 1·updated 5mo ago
We haven't classified any articles referencing CVE-2026-21121 yet. The external references above still apply.