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Priority review Notice Added Final

strongSwan Remote Denial of Service Vulnerability

Favicon for www.cert.ssi.gouv.fr CERT-FR Security Advisories
Published March 24th, 2026
Detected March 24th, 2026
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Summary

CERT-FR has issued a security advisory regarding a remote denial of service vulnerability (CVE-2026-25075) in strongSwan versions prior to 6.0.5. The advisory urges users to refer to the vendor's security bulletin for patch information.

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What changed

CERT-FR, the French national cybersecurity agency, has issued an advisory (CERTFR-2026-AVI-0344) detailing a critical remote denial of service vulnerability, identified as CVE-2026-25075, affecting strongSwan software versions prior to 6.0.5. The vulnerability allows an attacker to remotely disrupt the service.

Organizations utilizing strongSwan should immediately consult the vendor's security bulletin and apply the necessary patches or updates to mitigate the risk of exploitation. Failure to address this vulnerability could lead to service outages and potential downstream impacts on network operations.

What to do next

  1. Consult the strongSwan security bulletin for CVE-2026-25075
  2. Apply available patches or updates to strongSwan versions prior to 6.0.5

Source document (simplified)

Premier Ministre S.G.D.S.N

Agence nationale
de la sécurité des
systèmes d'information

Paris, le 24 mars 2026 N° CERTFR-2026-AVI-0344 Affaire suivie par: CERT-FR

Avis du CERT-FR

Objet: Vulnérabilité dans strongSwan

Gestion du document

| Référence | CERTFR-2026-AVI-0344 |
| Titre | Vulnérabilité dans strongSwan |
| Date de la première version | 24 mars 2026 |
| Date de la dernière version | 24 mars 2026 |
| Source(s) | Bulletin de sécurité StrongSwan cve-2026-25075 du 23 mars 2026 |
Une gestion de version détaillée se trouve à la fin de ce document.

Risque

  • Déni de service à distance

Systèmes affectés

  • strongSwan versions antérieures à 6.0.5

Résumé

Une vulnérabilité a été découverte dans strongSwan. Elle permet à un attaquant de provoquer un déni de service à distance.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Documentation

Gestion détaillée du document

  1. le 24 mars 2026 Version initiale

Named provisions

Risque Systèmes affectés Résumé Solutions Documentation

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Source

Favicon for www.cert.ssi.gouv.fr
CERT-FR Security Advisories cert.ssi.gouv.fr/avis
Data Privacy & Cybersecurity
Analysis generated by AI. Source diff and links are from the original.

Classification

Agency
CERT-FR
Published
March 24th, 2026
Instrument
Notice
Legal weight
Non-binding
Stage
Final
Change scope
Substantive
Document ID
CERTFR-2026-AVI-0344

Who this affects

Industry sector
5170 Telecommunications 5182 Data Processing & Hosting
Activity scope
VPN Management Network Security
Geographic scope
France FR

Taxonomy

Primary area
Cybersecurity
Operational domain
IT Security
Compliance frameworks
NIST CSF
Topics
Vulnerability Management Network Security

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