CVE-2026-78126 strongSwan CVE debrief

Who should care

Defenders responsible for strongSwan installations, network administrators, and security teams should assess exposure and potential impact. They should verify the strongSwan version and configuration, review system configurations and network architecture, and monitor for potential denial-of-service conditions. Additionally, they should prioritize verifying exposure and assessing potential impact, especially in using

Why it matters

CVE-2026-78126 is a NULL pointer dereference vulnerability in the eap-aka plugin of strongSwan versions 4.1.10 through 6.0.7. Defenders should prioritize verifying exposure, assessing potential impact, and taking necessary actions to prevent denial-of-service conditions.

• Potential denial-of-service conditions
• Verification of strongSwan version and configuration required
• Assessment of network architecture and system configurations necessary

Technical summary

The eap-aka plugin in strongSwan versions 4.1.10 through 6.0.7 is vulnerable to a NULL pointer dereference. This issue may allow an attacker to cause a denial-of-service condition. The vulnerability is located in the eap-aka plugin, which is a part of the strongSwan software. The affected versions are 4.1.10 through 6.0.7. The vulnerability could allow an attacker to cause a denial-of-service condition.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential impact, especially in environments using affected strongSwan versions.

Recommended defensive actions

• Verify strongSwan version and assess exposure
• Review system configurations and network architecture
• Monitor for potential denial-of-service conditions

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further analysis is required to determine the full scope of affected systems and potential impact.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.