strongSwan <6.0.6 Critical Vulnerabilities Allow Remote Code Execution
Summary
German federal CERT-Bund issued critical security advisory WID-SEC-2026-1247 disclosing multiple vulnerabilities in Open Source strongSwan versions prior to 6.0.6, with CVSS Base Score of 9.8 (critical) and CVSS Temporal Score of 8.5 (high). Remote attackers can exploit these vulnerabilities to conduct denial of service attacks or potentially execute arbitrary code. Organizations running affected strongSwan versions should apply available mitigations or upgrade to version 6.0.6.
“Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in strongSwan ausnutzen, um einen Denial of Service Angriff durchzuführen oder potenziell beliebigen Code auszuführen.”
Organizations running strongSwan VPN implementations should verify their installed version and prioritize patching to 6.0.6 given the CVSS 9.8 score and confirmed remote exploitation capability. Since the attack vector requires no authentication, any exposed strongSwan instance should be treated as a critical priority regardless of network placement.
About this source
CERT-Bund is the German federal cybersecurity agency's incident response team, run by the BSI. Their advisory feed publishes vulnerability disclosures and active exploitation warnings for software in widespread enterprise use: VPN appliances, email servers, file transfer products, ERP systems, browsers, hypervisors. Around 280 advisories a month, each with a CVSS score, affected versions, and remediation guidance. The advisories are written in German but cover the same vulnerabilities that show up in CISA, NCSC-UK, and JPCERT bulletins, often hours earlier. Watch this if you patch enterprise software, run a SOC, or write detection rules. GovPing publishes each advisory with the affected vendor, CVSS score, and original CERT-Bund link.
What changed
German federal CERT-Bund issued critical security advisory WID-SEC-2026-1247 disclosing multiple vulnerabilities in Open Source strongSwan versions prior to 6.0.6, with CVSS Base Score of 9.8 (critical) and CVSS Temporal Score of 8.5 (high). The vulnerabilities affect all supported platforms including UNIX, Windows, and other operating systems, as strongSwan is an IPSec-based VPN implementation widely used in enterprise and infrastructure environments.
Organizations running affected strongSwan versions should apply available mitigations or upgrade to version 6.0.6 immediately. The advisory confirms mitigations are available, and a remote anonymous attacker can exploit these vulnerabilities without authentication to potentially execute arbitrary code on affected systems.
Archived snapshot
Apr 23, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
[WID-SEC-2026-1247] strongSwan: Mehrere Schwachstellen ermöglichen Denial of Service und Codeausführung CVSS Base Score 9.8 (kritisch) CVSS Temporal Score 8.5 (hoch) Remoteangriff ja Datum 22.04.2026 Stand 23.04.2026 Mitigation ja
Betroffene Systeme
Betriebssystem
- Sonstiges
- UNIX
- Windows
Produktbeschreibung
Strongswan ist eine IPSec-basierte VPN Implementierung.
Produkte
22.04.2026
- Open Source strongSwan <6.0.6
Angriff
Angriff
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in strongSwan ausnutzen, um einen Denial of Service Angriff durchzuführen oder potenziell beliebigen Code auszuführen. CVE Informationen Versionshistorie Feedback zum Advisory geben
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Source document text, dates, docket IDs, and authority are extracted directly from CERT-Bund.
The summary, classification, recommended actions, deadlines, and penalty information are AI-generated from the original text and may contain errors. Always verify against the source document.
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