CVE-2025-27829 Denial of service in n/a
Attackers can disrupt multicast traffic on Stormshield Network Security firewalls if multicast streams are enabled on multiple interfaces, causing service denial.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-27829?
CVE-2025-27829 is a high-severity denial of service vulnerability in n/a, published on 1 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-400
Which versions are affected by CVE-2025-27829?
How do I fix CVE-2025-27829?
No fix has been published for CVE-2025-27829 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-27829 being exploited?
There is no known exploitation of CVE-2025-27829 in the wild and no public exploit code.
Sources
Also known as GHSA-g7gr-m9c4-cg88.