How severe is CVE-2018-10811?

CVE-2018-10811 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-10811 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-10811?

CVE-2018-10811 primarily affects Strongswan. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-10811?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-10811 published?

CVE-2018-10811 was published on 2018-06-19 and last updated on 2026-06-17.

CVE-2018-10811

CVE-2018-10811 is a high-severity vulnerability in Strongswan with a CVSS 3.x base score of 7.5. 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-909.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-909
Affected product: Strongswan
Published: 2018-06-19
Last modified: 2026-06-17

Description

strongSwan 5.6.0 and older allows Remote Denial of Service because of Missing Initialization of a Variable.

Frequently asked questions

What is CVE-2018-10811?: strongSwan 5.6.0 and older allows Remote Denial of Service because of Missing Initialization of a Variable.
How severe is CVE-2018-10811?: CVE-2018-10811 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-10811 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-10811?: CVE-2018-10811 primarily affects Strongswan. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-10811?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-10811 published?: CVE-2018-10811 was published on 2018-06-19 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*

More vulnerabilities in Strongswan

CVE-2004-0590 — Critical (CVSS 10.0): FreeS/WAN 1.x and 2.x, and other related products including superfreeswan 1.x, openswan 1.x before 1.0.6, openswan 2.x…
CVE-2023-41913 — Critical (CVSS 9.8): strongSwan before 5.9.12 has a buffer overflow and possible unauthenticated remote code execution via a DH public value…
CVE-2023-26463 — Critical (CVSS 9.8): strongSwan 5.9.8 and 5.9.9 potentially allows remote code execution because it uses a variable named "public" for two…
CVE-2015-3991 — Critical (CVSS 9.8): strongSwan 5.2.2 and 5.3.0 allows remote attackers to cause a denial of service (daemon crash) or execute arbitrary…
CVE-2021-45079 — Critical (CVSS 9.1): In strongSwan before 5.9.5, a malicious responder can send an EAP-Success message too early without actually…
CVE-2022-4967 — High (CVSS 7.7): strongSwan versions 5.9.2 through 5.9.5 are affected by authorization bypass through improper validation of certificate…

All CVEs affecting Strongswan →

Other CWE-909 vulnerabilities

CVE-2022-22704 — Critical (CVSS 9.8): The zabbix-agent2 package before 5.4.9-r1 for Alpine Linux sometimes allows privilege escalation to root because the…
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CVE-2021-29980 — High (CVSS 8.8): Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a…
CVE-2021-23994 — High (CVSS 8.8): A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound write. This…
CVE-2020-11741 — High (CVSS 8.8): An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (with active profiling) to obtain…
CVE-2024-9780 — High (CVSS 7.8): ITS dissector crash in Wireshark 4.4.0 allows denial of service via packet injection or crafted capture file

Browse all CWE-909 vulnerabilities →