CVE-2021-28096
MEDIUMCVSS 5.3/10EPSS 0.89%
Last modified
CVE-2021-28096 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An issue was discovered in Stormshield SNS before 4.2.3 (when the proxy is used). An attacker can saturate the proxy connection table. EPSS estimates a 0.89% chance of exploitation in the next 30 days.
Description
An issue was discovered in Stormshield SNS before 4.2.3 (when the proxy is used). An attacker can saturate the proxy connection table. This would result in the proxy denying any new connections.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Stormshield | Stormshield Network Security | >= 2.0.0, <= 2.7.8 |
| Stormshield | Stormshield Network Security | >= 3.7.6, <= 3.7.20 |
| Stormshield | Stormshield Network Security | >= 3.8.0, <= 3.11.8 |
| Stormshield | Stormshield Network Security | >= 4.0.1, < 4.2.3 |
References
- https://advisories.stormshield.eu/2021-005/Vendor Advisory
- https://advisories.stormshield.eu/2021-005/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-28096?
An issue was discovered in Stormshield SNS before 4.2.3 (when the proxy is used). An attacker can saturate the proxy connection table. This would result in the proxy denying any new connections.
How severe is CVE-2021-28096?
CVE-2021-28096 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.89% probability of exploitation in the next 30 days.
How do I fix CVE-2021-28096?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-28096?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST