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Vulnerability record · CVE-2026-78126 · published 11 September 2026

CVE-2026-78126: Strongswan null pointer dereference vulnerability

Strongswan · Strongswan

strongSwan 4.1.10 through 6.0.7 allows a NULL pointer dereference in the eap-aka plugin.

5.9 CVSS 3.1 Medium EPSS 0.41% · top 66.4% CWE-476 · NULL pointer dereference
5.9CVSS 3.1 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
14 Sep 2026Last modified by NVD

Description

strongSwan 4.1.10 through 6.0.7 allows a NULL pointer dereference in the eap-aka plugin.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/strongswan/strongswan/releases/tag/6.1.0 PatchRelease NotesVendor Advisory
https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78126).html MitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2004-0590Frees wan vulnerabilityFreeS/WAN 1.x and 2.x, and other related products including superfreeswan 1.x, openswan 1.x before 1.0.6, openswan 2.x before 2.1.4, and strongSwan b…EPSS 2.8%9.8CVE-2023-41913Strongswan classic buffer overflow vulnerabilitystrongSwan before 5.9.12 has a buffer overflow and possible unauthenticated remote code execution via a DH public value that exceeds the internal buf…EPSS 2.3%9.8CVE-2023-26463Strongswan improper certificate validation vulnerabilitystrongSwan 5.9.8 and 5.9.9 potentially allows remote code execution because it uses a variable named "public" for two different purposes within the s…EPSS 2.3%9.8CVE-2015-3991Strongswan vulnerabilitystrongSwan 5.2.2 and 5.3.0 allows remote attackers to cause a denial of service (daemon crash) or execute arbitrary code.EPSS 4.6%9.1CVE-2021-45079Strongswan null pointer dereference vulnerabilityIn strongSwan before 5.9.5, a malicious responder can send an EAP-Success message too early without actually authenticating the client and (in the ca…EPSS 2.8%7.5CVE-2026-78132Strongswan vulnerabilitystrongSwan 5.1.3 through 6.0.7 has an infinite loop in the x509 plugin's attribute certificate parser for ietfAttrSyntax.EPSS 0.32%7.5CVE-2026-78130Strongswan null pointer dereference vulnerabilitystrongSwan 4.2.0 through 6.0.7 has a NULL pointer dereference in the x509 plugin's attribute certificate parser.EPSS 0.32%7.5CVE-2026-78133Strongswan use after free vulnerabilitylibcharon in strongSwan 6.0.0 through 6.0.7 has a use-after-free in IKEv2 rekeying collision handling.EPSS 0.43%

Source: NIST National Vulnerability Database (record CVE-2026-78126), CISA KEV, FIRST EPSS (scores of 2026-10-11). This page is refreshed as NVD updates the record.