EUVD-2026-75906
GHSA-rv8v-63hf-3gj7
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable IKE daemon, no authentication or interaction needed; pure DoS with no confidentiality or integrity impact.
Primary rating from Vendor (vendor:ubuntu).
CVSS VectorVendor: vendor:ubuntu
Lifecycle Timeline
7DescriptionCVE.org
Infinite Loop When Parsing Attribute Certificates
AnalysisAI
Denial of service via infinite loop in strongSwan's x509 plugin affects all deployments that process X.509 attribute certificates. An unauthenticated remote attacker can craft a malformed attribute certificate that triggers CWE-835 (infinite loop) during parsing, causing the IKE daemon to hang indefinitely and disrupting all VPN connectivity. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special authentication is required - the CVSS PR:N and AV:N metrics confirm unauthenticated remote exploitation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 rating (AV:N/AC:L/PR:N/UI:N) accurately reflects the remote, zero-interaction, zero-authentication exploitability of this DoS, though the S:U/A:H combination caps it below critical since no code execution or data breach is possible. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to strongSwan 6.1.0, available at https://github.com/strongswan/strongswan/releases/tag/6.1.0, which addresses CVE-2026-78132 and six other vulnerabilities simultaneously disclosed in the 2026-09-07 advisory at https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78132).html. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all strongSwan deployments in your infrastructure and determine which versions are running; assess the business impact of VPN unavailability for each location or remote workforce segment. …
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External POC / Exploit Code
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