Security readout for executives and security teams
Plain-English summary
Event Log Explorer 4.9.3 has a Windows service configuration flaw. A local, low-privileged user could abuse the unquoted service path for ElodeaEventCollectorService to run code with LocalSystem privileges when the service starts. This is mainly an insider, compromised-account, or post-compromise escalation risk, not a remote entry point.
Executive priority
Prioritize remediation on shared workstations, admin jump boxes, and servers where Event Log Explorer 4.9.3 is installed. Treat as high severity for hardening and patch management, but not as an internet-facing emergency based on current provided evidence.
Technical view
CVE-2021-47861 is a CWE-428 unquoted service path issue in FSPro Labs Event Log Explorer 4.9.3. The vulnerable service is identified as ElodeaEventCollectorService. The CVSS 4.0 vector is AV:L/AC:L/PR:L/UI:N with high confidentiality, integrity, and availability impact to the vulnerable system.
Likely exposure
Exposure is limited to Windows systems running Event Log Explorer 4.9.3 with the affected service installed. Exploitation requires local access and low privileges. Systems where standard users can write to relevant service path locations are most concerning.
Exploitation context
Public exploit information is referenced by ExploitDB, but the provided sources do not show confirmed active exploitation or CISA KEV listing. This vulnerability is useful after initial access because it can elevate privileges to LocalSystem during service startup.
Researcher notes
The source bundle identifies version 4.9.3 and ElodeaEventCollectorService only. No vendor patch note or fixed version is included. Avoid assuming other versions are affected. Validate service path quoting and ACL exposure in a lab or authenticated configuration review.
Mitigation direction
- Identify systems running Event Log Explorer 4.9.3.
- Check vendor guidance for fixed versions or configuration recommendations.
- Restrict write permissions on directories in the service executable path.
- Ensure the affected Windows service path is properly quoted if vendor-supported.
- Reduce local user privileges on systems running the product.
Validation and detection
- Inventory installed Event Log Explorer versions across Windows endpoints and servers.
- Review ElodeaEventCollectorService configuration for an unquoted executable path.
- Verify directory ACLs along the service path are not writable by low-privileged users.
- Confirm whether vendor updates or guidance have been applied.
- Monitor service start events and privilege escalation indicators on affected hosts.
Public sources used
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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-47861 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-49704CVE reference · exploit
- Vendor HomepageCVE reference · product
- VulnCheck Advisory: Event Log Explorer 4.9.3 - 'ElodeaEventCollectorService' Unquoted Service PathCVE 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.