No exploitation reportedFix available

CVE-2022-40617

Q: Is CVE-2022-40617 actively exploited?

Active exploitation of CVE-2022-40617 has not been confirmed. Its EPSS score was 1.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2022-40617?

CVE-2022-40617 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2022-10-31
WeaknessCWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

strongSwan before 5.9.8 allows remote attackers to cause a denial of service in the revocation plugin by sending a crafted end-entity (and intermediate CA) certificate that contains a CRL/OCSP URL that points to a server (under the attacker's control) that doesn't properly respond but (for example) just does nothing after the initial TCP handshake, or sends an excessive amount of application data.

Timeline

dates in UTC

2022-10-3106:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-40617?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-40617?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Canonical ubuntu linux

Branch	Affected	Fixed in	Source
14.4	= 14.04	no fix published	NVD
16.4	= 16.04	no fix published	NVD
18.4	= 18.04	no fix published	NVD
20.4	= 20.04	no fix published	NVD
22.4	= 22.04	no fix published	NVD

Stormshield stormshield network security

Branch	Affected	Fixed in	Source
4.x	≥ 4.5.1, < 4.6.0	4.6.0	NVD
4.3	≥ 4.3.1, < 4.3.15	4.3.15	NVD
3.11	≥ 3.11.1, < 3.11.20	3.11.20	NVD

Debian debian linux

Branch	Affected	Fixed in	Source
10.0	= 10.0	no fix published	NVD
11.0	= 11.0	no fix published	NVD

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-05-06
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.52025-05-06
NVDCVSS 3.17.5read 2026-10-23
CISA-ADPweakness (CWE)CWE-4002025-05-06
NVDweakness (CWE)CWE-400read 2026-10-23
FIRST EPSSEPSS score1.8 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2022-10-31
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2022-40617?

Is CVE-2022-40617 actively exploited?

Active exploitation of CVE-2022-40617 has not been confirmed. Its EPSS score was 1.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-40617?

CVE-2022-40617 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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