No exploitation reported

CVE-2023-39340

No exploitation reported by the sources we read.

Published2023-12-16

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

A vulnerability exists on all versions of Ivanti Connect Secure below 22.6R2 where an attacker can send a specific request which may lead to Denial of Service (DoS) of the appliance.

Timeline

dates in UTC

2023-12-1602:15CVE 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-2023-39340?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-39340?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Ivanti Connect Secure

Branch	Affected	Fixed in	Source
22.1	= 22.1	no fix published	NVD
22.2	= 22.2	no fix published	NVD
22.3	= 22.3	no fix published	NVD
22.4	= 22.4	no fix published	NVD
22.5	= 22.5	no fix published	NVD
9.1	= 9.1	no fix published	NVD
22.6	= 22.6	no fix published	NVD

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

Fix

Advisories and patches

forums.ivanti.comVendor Advisory

Detection

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

Sources

CISA-ADPSSVC decisionnone2024-11-27
OpenCVESSVC decisionnone—
NVDCVSS 3.17.5read 2026-10-23
CNACVSS 3.07.5read 2026-10-23
FIRST EPSSEPSS score2.4 %2026-10-23

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: 2023-12-16
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-39340?

A vulnerability exists on all versions of Ivanti Connect Secure below 22.6R2 where an attacker can send a specific request which may lead to Denial of Service (DoS) of the appliance.

Is CVE-2023-39340 actively exploited?

Active exploitation of CVE-2023-39340 has not been confirmed. Its EPSS score was 2.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-39340?

CVE-2023-39340 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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