Vulnerability in Osas Traverse Extension
CVE-2021-47864
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (3.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
- Osas Traverse Extension — versions 11 x86
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49698 (exploit)
- web.archive.org/web/20200817150522/https://www.osas.com/ (product)
- www.vulncheck.com/advisories/osas-traverse-extension-travextensionhostsvc-unquo… (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47864?
- CVE-2021-47864 is a high-severity vulnerability in Osas Traverse Extension, classified under Unquoted Search Path or Element. CVSS score: 7.8/10. Published 2026-01-21.
- How severe is CVE-2021-47864?
- High severity. CVSS v3 base score is 7.8 out of 10.