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CVE-2025-27829

HIGHCVSS 7.3/10EPSS 0.26%

Last modified

CVE-2025-27829 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. An issue was discovered in Stormshield Network Security (SNS) 4.3.x before 4.3.35. If multicast streams are enabled on different interfaces, it may be possible to interrupt multicast traffic on some of these interfaces. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

Description

An issue was discovered in Stormshield Network Security (SNS) 4.3.x before 4.3.35. If multicast streams are enabled on different interfaces, it may be possible to interrupt multicast traffic on some of these interfaces. That could result in a denial of the multicast routing service on the firewall.

Metrics

CVSS 3.1
7.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS Probability
0.26%

17.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2025-27829?
An issue was discovered in Stormshield Network Security (SNS) 4.3.x before 4.3.35. If multicast streams are enabled on different interfaces, it may be possible to interrupt multicast traffic on some of these interfaces. That could result in a denial of the multicast routing service on the firewall.
How severe is CVE-2025-27829?
CVE-2025-27829 has a CVSS score of 7.3/10 (HIGH severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.
How do I fix CVE-2025-27829?
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.

Are you affected by CVE-2025-27829?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST