An issue was discovered in Stormshield SNS before 4.2.3 (when the proxy is used).
Priority LOW 26CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-770.
Summary
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.
Why it matters now
EPSS 0.00889 59th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:stormshield:stormshield_network_security:*:*:*:*:*:*:*:* | 2.0.0 – 2.7.8; 3.7.6 – 3.7.20; 3.8.0 – 3.11.8; 4.0.1 to before 4.2.3 | Vulnerable | Stormshield |
- cpe:2.3:a:stormshield:stormshield_network_security:*:*:*:*:*:*:*:* Versions 2.0.0 – 2.7.8; 3.7.6 – 3.7.20; 3.8.0 – 3.11.8; 4.0.1 to before 4.2.3 Vulnerable ·Stormshield
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-28096
- 2026-10-03 Alias added: GHSA-783c-38cj-6q3h
References
More Stormshield Network Security vulnerabilities
- TI-2022-17498 zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in… CVSS 3.1CRITICAL 9.8
- TI-2023-00271 X.400 address type confusion in X.509 GeneralName CVSS 3.1HIGH 7.4
- TI-2023-06741 Buffer overflow in Cisco Secure Web Appliance CVSS 3.1CRITICAL 9.8
- TI-2022-04067 Double free after calling PEM_read_bio_ex CVSS 3.1HIGH 7.5
- TI-2002-02356 The Diffie-Hellman Key Agreement Protocol allows remote attackers (from the client side)… CVSS 3.1HIGH 7.5
- TI-2020-05988 Out-of-bounds write in MPD: FreeBSD PPP daemon CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-28096 · CVE Program
- CVE-2021-28096 · NVD
- FIRST EPSS
- GHSA-783c-38cj-6q3h · GitHub Advisory Database · CC BY 4.0
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