How severe is CVE-2026-78123?

CVE-2026-78123 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-78123 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-78123?

CVE-2026-78123 affects Strongswan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-78123?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-78123 published?

CVE-2026-78123 was published on 2026-09-11 and last updated on 2026-09-15.

CVE-2026-78123

CVE-2026-78123 is a medium-severity vulnerability in Strongswan with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-825.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-825
Affected product: Strongswan
Published: 2026-09-11
Last modified: 2026-09-15

Description

strongSwan 5.0.2 through 6.0.7 has an Expired Pointer Dereference in PKCS#7 parsing in the openssl plugin.

Frequently asked questions

What is CVE-2026-78123?: strongSwan 5.0.2 through 6.0.7 has an Expired Pointer Dereference in PKCS#7 parsing in the openssl plugin.
How severe is CVE-2026-78123?: CVE-2026-78123 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-78123 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-78123?: CVE-2026-78123 affects Strongswan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-78123?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-78123 published?: CVE-2026-78123 was published on 2026-09-11 and last updated on 2026-09-15.

References

Affected products (1)

cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*

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Other CWE-825 vulnerabilities

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CVE-2026-8854 — High (CVSS 7.5): IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_mem_cache.
CVE-2025-49795 — High (CVSS 7.5): A NULL pointer dereference vulnerability was found in libxml2 when processing XPath XML expressions. This flaw allows…
CVE-2023-20212 — High (CVSS 7.5): A vulnerability in the AutoIt module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of…

Browse all CWE-825 vulnerabilities →