MEDIUM
CVE-2021-3398
CWE-190Published: February 10, 2022· Updated: Jun 17, 2026
5.8
CVSS v3.1
Official Description
Stormshield Network Security (SNS) 3.x has an Integer Overflow in the high-availability component.
Technical Analysis
CVE-2021-3398 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeChanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Affected Vendors & Products
stormshield1 product(s)
stormshield network security
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (4)
→
https://advisories.stormshield.eu/2021-001/Vendor Advisory
→
https://www.stormshield.com/category/alert/Vendor Advisory
→
https://advisories.stormshield.eu/2021-001/Vendor Advisory
→
https://www.stormshield.com/category/alert/Vendor Advisory
Quick Facts
CVE IDCVE-2021-3398
CVSS Score5.8 / 10
SeverityMEDIUM
WeaknessCWE-190
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 10, 2022
Related CVEs (CWE-190)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-3398 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.