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CVE-2021-47864

28
FAUCET Score

CVE-2021-47864 describes an unquoted service path vulnerability in the TravExtensionHostSvc service within OSAS Traverse Extension 11. This flaw allows an attacker with local system access to execute arbitrary code with LocalSystem privileges by placing a malicious executable in the service's path. Rated with a CVSS score of 7.8 (High), the vulnerability poses a significant risk of complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered some community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
OSASOSAS Traverse Extension
11 x86CNA affected

CVSS Data

CVSS version used by this source: 4.0

8.5HIGH

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.13%
Probability of exploitation in next 30 days
EPSS Percentile
2.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0013 is in the 13th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 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

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