Is CVE-2021-33436 in the CISA KEV catalog?

No. CVE-2021-33436 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-33436?

CVE-2021-33436 has a CVSS v3 base score of 7.3 (HIGH).

What is the EPSS score for CVE-2021-33436?

CVE-2021-33436 has an EPSS score of 0.27% (19th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-33436?

Upgrade NoMachine to 7.5.2 or later.

CVE & CISA-KEV Catalog

CVE-2021-33436

HIGH

7.3

CVSS v3

NVD

Description

NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading. This vulnerability allows local non-privileged users to perform DLL Hijacking via any writable directory listed under the system path and ultimately execute code as NT AUTHORITY\SYSTEM.

How to fix

Remediation Available

NoMachineWindows application

Affected:7.0 7.5.2Fixed in:7.5.2NoMachine S.a.r.l.

Affected:6.0.0 6.15.1Fixed in:6.15.1NoMachine S.a.r.l.

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 InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.27%probability of exploitation in 30 days

19thpercentile

Low risk: more likely to be exploited than 19% of all known CVEs.

References

Vendor Advisory3

Third-Party Advisory1

github.com

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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.