CVE-2021-22965

A vulnerability in Pulse Connect Secure before 9.1R12.1 could allow an unauthenticated administrator to causes a denial of service when a malformed request is sent to the device.

Published: 2021-11-19 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-22965 is rated Moderate Risk (62.2/100): CVSS High severity, with high exploitation likelihood (EPSS 13.62%, 94th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-22965

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 14.27% 13.62% -0.65%
2 2025-11-18 13.62% 14.27% +0.65%
3 2025-11-08 — 13.62% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-22965

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2021-22965

Affected software / configurations for CVE-2021-22965

Vendor Product Version Raw CPE
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:-:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r1:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r10.0:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r10.2:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r11.0:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r11.1:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r11.3:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r11.4:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r12:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r2:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r3:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r4:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r4.1:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r4.2:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r4.3:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r5:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r6:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r7:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r8:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r8.1:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r8.2:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r8.4:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r9:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r9.1:*:*:*:*:*:*
ivanti connect_secure 9.1 cpe:2.3:a:ivanti:connect_secure:9.1:r9.2:*:*:*:*:*:*
pulsesecure pulse_connect_secure < 9.1 cpe:2.3:a:pulsesecure:pulse_connect_secure:*:*:*:*:*:*:*:*

References for CVE-2021-22965

cvelogic Threat Intelligence