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CVE-2021-42110

24
FAUCET Score

CVE-2021-42110 is a DLL hijacking vulnerability in Allegro Windows (formerly Popsy Windows) versions prior to 3.3.4156.1, specifically when the FTP module is installed. This allows a standard user to escalate privileges to SYSTEM. With a CVSS score of 7.8 (HIGH), the vulnerability has a low attack complexity and requires user interaction, but can lead to high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.3.4156.1CPE matchmatch criteria
cpe:2.3:a:allegro:allegro:*:*:*:*:*:windows:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 19th percentile among its peer group of 11,616 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cds.thalesgroup.com / en/tcs-cert/CVE-2021-42110
excellium-services.com / cert-xlm-advisory/CVE-2021-42110
PatchThird Party Advisory
popsy.com / Documents/Setups/Setup.Allegro.3.3.4154.2.exe
PatchVendor Advisory