CVE-2021-47864

OSAS Traverse Extension 11 - 'travextensionhostsvc' Unquoted Service Path

CVSS 8.5 HIGHEPSS 0.1%CWE-428

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.5EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

21 Jan 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

OSAS Traverse Extension 11 contains an unquoted service path vulnerability in the TravExtensionHostSvc service running with LocalSystem privileges. Attackers can exploit the unquoted path to inject and execute malicious code by placing executable files in the service's path, potentially gaining elevated system access.

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

OSAS · OSAS Traverse Extension

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References

https://web.archive.org/web/20200817150522/https://www.osas.com/https://www.exploit-db.com/exploits/49698 https://www.vulncheck.com/advisories/osas-traverse-extension-travextensionhostsvc-unquoted-service-path