Security readout for executives and security teams
Plain-English summary
Epson USB Display 1.6.0.0 installs a Windows service in a way that can let a lower-privileged local user gain full system privileges. This is mainly a workstation or shared-machine risk, not a remote internet-facing issue. Public exploit information exists, but the supplied sources do not show active exploitation.
Executive priority
Treat as a high-priority endpoint hardening issue where Epson USB Display is installed. It is less urgent than remotely exploitable internet-facing flaws, but important on shared systems because successful exploitation can give full local system control.
Technical view
CVE-2021-47898 is a CWE-428 unquoted service path issue in the EMP_UDSA service. The service runs as LocalSystem, so abuse can elevate a local authenticated user to high-impact system control. CVSS v4.0 is 8.5 with local attack vector, low complexity, low privileges required, and no user interaction.
Likely exposure
Systems with Epson USB Display version 1.6.0.0 installed are the known affected scope. Exposure is most relevant on Windows endpoints where untrusted or low-privileged users can log in locally. The provided sources do not identify other affected versions or products.
Exploitation context
The CVE is not listed as KEV in the supplied bundle. ExploitDB is cited, indicating public exploit information exists. The available evidence supports local privilege escalation risk, not remote unauthenticated compromise or confirmed in-the-wild exploitation.
Researcher notes
Evidence is strongest for Epson USB Display 1.6.0.0 and EMP_UDSA. The source bundle does not provide a vendor patch note, fixed version, or broader version range. Avoid assuming other Epson products are affected without additional vendor evidence.
Mitigation direction
- Check Epson guidance for an updated installer or vendor-supported remediation.
- Remove Epson USB Display where it is not business-required.
- Disable the EMP_UDSA service if operationally safe and approved.
- Restrict local user access on affected shared workstations.
- Prioritize remediation on kiosks, labs, and multi-user endpoints.
Validation and detection
- Inventory endpoints for Epson USB Display version 1.6.0.0.
- Confirm whether the EMP_UDSA service is present.
- Review the service executable path for unquoted spaces.
- Confirm whether the service runs with LocalSystem privileges.
- Document affected hosts and prioritize those with local non-admin users.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-428: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-47898 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.5 (4.0)
- Known Exploited
- No
- Published
Vector: 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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.5HighVector: 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
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-49548CVE reference · exploit
- Epson Official HomepageCVE reference · product
- VulnCheck Advisory: Epson USB Display 1.6.0.0 Unquoted Service Path VulnerabilityCVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Unquoted Search Path or Element
Unquoted Search Path or Element represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.