CVE•Published 2021-03-23•Modified 2026-10-07•1 article on news•4 live references•NVD data
CVE-2021-21350Netapp · Oncommand_insight
Vulnerability data via NVD (ingested)
CVSS v3.1
5.3
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
EPSS percentile
97
Exploit Prediction Scoring System · top 3% of all CVEs
Weaknesses (CWE)
Description
XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to execute arbitrary code only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.
Timeline
Published 2021-03-23
Modified 2026-10-07
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 tag14 hosts
vuln:CVE-2021-21350Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Netapp Oncommand Insight"All exposed Netapp Oncommand Insight instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Oncommand Insight"HTTP body or banner mentions "Oncommand Insight" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-21350Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-21350Censys host search filtered to this CVE id.
grep.app
CVE-2021-21350Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-21350GitHub code search for direct mentions.
Google dork
"CVE-2021-21350" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2021-21350 on GitHub.