CVE•Published 2026-04-10•Modified 2026-05-29•1 article on news•6 live references•NVD data
CVE-2021-47961Synology · Ssl_vpn_client
Vulnerability data via NVD (ingested)
CVSS v3.1
8.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS percentile
13
Exploit Prediction Scoring System · top 87% of all CVEs
Weaknesses (CWE)
Description
A plaintext storage of a password vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access or influence the user's PIN code due to insecure storage. This may lead to unauthorized VPN configuration and potential interception of subsequent VPN traffic when combined with user interaction.
Timeline
Published 2026-04-10
Modified 2026-05-29
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-2021-47961Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Synology Ssl Vpn Client"All exposed Synology Ssl Vpn Client instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Ssl Vpn Client"HTTP body or banner mentions "Ssl Vpn Client" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-47961Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-47961Censys host search filtered to this CVE id.
grep.app
CVE-2021-47961Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-47961GitHub code search for direct mentions.
Google dork
"CVE-2021-47961" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2021-47961 on GitHub.