CVE-2021-42110

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.

CVSS v3 7.1 HIGH
CVSS v2.0 6.2 MEDIUM

7.1^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

6.2^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:L/AC:H/Au:N/C:C/I:C/A:C

Exploitability : 1.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity HIGH

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
http://www.popsy.com/Documents/Setups/Setup.Allegro.3.3.4154.2.exe	Patch Vendor Advisory
https://cds.thalesgroup.com/en/tcs-cert/CVE-2021-42110
https://excellium-services.com/cert-xlm-advisory/CVE-2021-42110	Patch Third Party Advisory
http://www.popsy.com/Documents/Setups/Setup.Allegro.3.3.4154.2.exe	Patch Vendor Advisory
https://excellium-services.com/cert-xlm-advisory/CVE-2021-42110	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:allegro:allegro:*:*:*:*:*:windows:*:*

History

30 May 2025, 16:15

Type	Values Removed	Values Added
References		() https://cds.thalesgroup.com/en/tcs-cert/CVE-2021-42110 -

21 Nov 2024, 06:27

Type	Values Removed	Values Added
References	~~() http://www.popsy.com/Documents/Setups/Setup.Allegro.3.3.4154.2.exe - Patch, Vendor Advisory~~	() http://www.popsy.com/Documents/Setups/Setup.Allegro.3.3.4154.2.exe - Patch, Vendor Advisory
References	~~() https://excellium-services.com/cert-xlm-advisory/CVE-2021-42110 - Patch, Third Party Advisory~~	() https://excellium-services.com/cert-xlm-advisory/CVE-2021-42110 - Patch, Third Party Advisory
CVSS	v2 : ~~6.2~~ v3 : ~~7.8~~	v2 : 6.2 v3 : 7.1

Information

Published : 2021-12-08 16:15

Updated : 2025-05-30 16:15

NVD link : CVE-2021-42110

Mitre link : CVE-2021-42110

CVE.ORG link : CVE-2021-42110

JSON object : View

Products Affected

allegro

allegro

CWE

NVD-CWE-noinfo

{"id": "CVE-2021-42110", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:H/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "HIGH", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 1.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 4.2, "exploitabilityScore": 2.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2021-12-08T16:15:07.147", "references": [{"url": "http://www.popsy.com/Documents/Setups/Setup.Allegro.3.3.4154.2.exe", "tags": ["Patch", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://cds.thalesgroup.com/en/tcs-cert/CVE-2021-42110", "source": "cve@mitre.org"}, {"url": "https://excellium-services.com/cert-xlm-advisory/CVE-2021-42110", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.popsy.com/Documents/Setups/Setup.Allegro.3.3.4154.2.exe", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://excellium-services.com/cert-xlm-advisory/CVE-2021-42110", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Se ha detectado un problema en Allegro Windows (anteriormente Popsy Windows) versiones anteriores a 3.3.4156.1. Un usuario est\u00e1ndar puede escalar privilegios a SYSTEM si el m\u00f3dulo FTP est\u00e1 instalado, debido al secuestro de DLL"}], "lastModified": "2025-05-30T16:15:29.060", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:allegro:allegro:*:*:*:*:*:windows:*:*", "vulnerable": true, "matchCriteriaId": "4B00CAF2-2226-4D8E-910A-D6A0EE4E189D", "versionEndExcluding": "3.3.4156.1"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}

7.1 /10