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CVE-2021-3384

MEDIUM
5.3
CVSS Score
Published: March 2, 2021 at 05:08 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
1 product affected across 1 vendorNetwork Security

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Severity
MEDIUM5.3
Exploit prediction
EPSS 1%

Description

A vulnerability in Stormshield Network Security could allow an attacker to trigger a protection related to ARP/NDP tables management, which would temporarily prevent the system to contact new hosts via IPv4 or IPv6. This affects versions 2.0.0 to 2.7.7, 2.8.0 to 2.16.0, 3.0.0 to 3.7.16, 3.8.0 to 3.11.4, and 4.0.0 to 4.1.5. Fixed in versions 2.7.8, 3.7.17, 3.11.5, and 4.2.0.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Network Security· Stormshield
95%
2.0.0 ≤ v < 2.7.82.8.0 ≤ v ≤ 2.16.03.0.0 ≤ v ≤ 3.7.173.8.0 ≤ v ≤ 3.11.54.0.0 ≤ v < 4.1.5
Affected range stops below 2.7.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://advisories.stormshield.eu/2020-049/

CVSS

5.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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