Is CVE-2021-42110 in the CISA KEV catalog?

No. CVE-2021-42110 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42110?

CVE-2021-42110 has a CVSS v3 base score of 7.1 (HIGH).

What is the EPSS score for CVE-2021-42110?

CVE-2021-42110 has an EPSS score of 0.29% (21th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42110?

Upgrade allegro to 3.3.4156.1 or later.

CVE & CISA-KEV Catalog

CVE-2021-42110

HIGH

7.1

CVSS v3

NVD

Description

An issue was discovered in Allegro Windows (formerly Popsy Windows) before 3.3.4156.1. A standard user can escalate privileges to SYSTEM if the FTP module is installed, because of DLL hijacking.

How to fix

Remediation Available

allegroNVD

Affected:< 3.3.4156.1Fixed in:3.3.4156.1CVE-2021-42110derived 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 VectorAdjacent

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.29%probability of exploitation in 30 days

21stpercentile

Low risk: more likely to be exploited than 21% of all known CVEs.

References

Patch2

Other references1

cds.thalesgroup.com

Embed a live status badge for CVE-2021-42110

Markdown

[![CVE-2021-42110](https://tridentstack.com/cve/badge/CVE-2021-42110.svg)](https://tridentstack.com/cve/CVE-2021-42110)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-42110"><img src="https://tridentstack.com/cve/badge/CVE-2021-42110.svg" alt="CVE-2021-42110"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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 2025-05-30.