Is CVE-2021-22159 in the CISA KEV catalog?

No. CVE-2021-22159 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-22159?

CVE-2021-22159 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-22159?

CVE-2021-22159 has an EPSS score of 0.33% (25th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-22159?

Upgrade insider threat management to 7.11.0.25 or later.

CVE & CISA-KEV Catalog

CVE-2021-22159

HIGH

7.8

CVSS v3

NVD

Description

Insider Threat Management Windows Agent Local Privilege Escalation Vulnerability The Proofpoint Insider Threat Management (formerly ObserveIT) Agent for Windows before 7.4.3, 7.5.4, 7.6.5, 7.7.5, 7.8.4, 7.9.3, 7.10.2, and 7.11.0.25 as well as versions 7.3 and earlier is missing authentication for a critical function, which allows a local authenticated Windows user to run arbitrary commands with the privileges of the Windows SYSTEM user. Agents for MacOS, Linux, and ITM Cloud are not affected.

CWE-306Missing Authentication for Critical Function

How to fix

Remediation Available

insider threat managementNVD

Affected:>= 7.11.0.0, < 7.11.0.25Fixed in:7.11.0.25CVE-2021-22159derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.33%probability of exploitation in 30 days

25thpercentile

Low risk: more likely to be exploited than 25% of all known CVEs.

References

Vendor Advisory2

Related Vulnerabilities

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-10271	High	7.5	100%	KEV + Ransom	-
CVE-2023-42793	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2025-3248	Critical	9.8	100%	KEV	Fix
CVE-2022-1388	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2021-37415	Critical	9.8	100%	KEV	-
CVE-2023-21839	High	7.5	100%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.