Softros Systems LogonExpert 8.1 LogonExpertSvc Service unquoted search path

Summaryinfo

A vulnerability classified as problematic has been found in Softros Systems LogonExpert 8.1. Impacted is an unknown function of the component LogonExpertSvc Service. The manipulation leads to unquoted search path. This vulnerability is uniquely identified as CVE-2021-47890. Local access is required to approach this attack. Moreover, an exploit is present.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Softros Systems LogonExpert 8.1. This issue affects some unknown processing of the component LogonExpertSvc Service. The manipulation with an unknown input leads to a unquoted search path vulnerability. Using CWE to declare the problem leads to CWE-428. The product uses a search path that contains an unquoted element, in which the element contains whitespace or other separators. This can cause the product to access resources in a parent path. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

LogonExpert 8.1 contains an unquoted service path vulnerability in the LogonExpertSvc service running with LocalSystem privileges. Attackers can exploit the unquoted path to place malicious executables in intermediate directories, potentially gaining elevated system access during service startup.

The weakness was disclosed by Victor Mondragón as 49586. The advisory is shared at exploit-db.com. The identification of this vulnerability is CVE-2021-47890 since 01/18/2026. The exploitation is known to be difficult. An attack has to be approached locally. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1574.009 for this issue.

The exploit is available at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (49586). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Softros Systems

Name

• LogonExpert

Version

• 8.1

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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