CVE•Published 2022-02-03•Modified 2026-08-11•1 article on news•5 live references•NVD data
CVE-2021-41838Insyde · Insydeh2o
Vulnerability data via NVD (ingested)
CVSS v3.1
8.2
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS percentile
22
Exploit Prediction Scoring System · top 78% of all CVEs
Description
An issue was discovered in SdHostDriver in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker to access the System Management Mode and execute arbitrary code. This occurs because of a Numeric Range Comparison Without a Minimum Check.
Timeline
Published 2022-02-03
Modified 2026-08-11
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-2021-41838Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Insyde Insydeh2o"All exposed Insyde Insydeh2o instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Insydeh2o"HTTP body or banner mentions "Insydeh2o" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-41838Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-41838Censys host search filtered to this CVE id.
grep.app
CVE-2021-41838Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-41838GitHub code search for direct mentions.
Google dork
"CVE-2021-41838" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2021-41838 on GitHub.