Security readout for executives and security teams
Plain-English summary
Acer Global Registration Service 1.0.0.3 has a Windows service configuration flaw. A local user could potentially turn it into administrator-level code execution when the service starts. This is not a remote internet-facing issue, but it matters on shared, compromised, or lightly managed endpoints.
Executive priority
Treat as high priority for endpoint hardening, especially on shared workstations, kiosks, or systems handling sensitive data. It is not a remote compromise by itself, but it can help an attacker gain full control after initial access.
Technical view
CVE-2020-36976 is a CWE-428 unquoted service path issue in Acer Global Registration Service 1.0.0.3, involving GREGsvc.exe under C:\Program Files (x86)\Acer\Registration\. The CVSS 4.0 score is 8.5. Exploitation requires local low-privileged access and may result in LocalSystem code execution during service startup.
Likely exposure
Exposure is likely limited to Windows endpoints with Acer Global Registration Service version 1.0.0.3 installed. The provided sources do not identify other affected versions or products. Systems are most at risk where low-privileged users or malware can write into relevant service path locations.
Exploitation context
ExploitDB lists a public exploit reference, so the technique is publicly documented. The source bundle does not show CISA KEV inclusion or confirmed active exploitation. This is a local privilege escalation issue, typically useful after an attacker already has user-level access.
Researcher notes
The evidence supports a local privilege escalation via unquoted service path. Patch status is not established in the provided sources. Do not assume broader Acer product impact beyond Global Registration Service 1.0.0.3 without additional vendor confirmation.
Mitigation direction
- Check Acer guidance for an updated or supported remediation.
- Upgrade or remove the service if Acer provides a supported path.
- Restrict write access to the Acer Registration directory.
- Quote the service executable path only through approved change control.
- Prioritize remediation on shared or high-risk endpoints.
Validation and detection
- Inventory endpoints for Acer Global Registration Service 1.0.0.3.
- Review the GREGsvc.exe service path for unquoted spaces.
- Confirm unprivileged users cannot write to relevant directories.
- Check endpoint telemetry for unexpected launches from Acer Registration paths.
- Track remediation status against Acer or vendor guidance.
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-2020-36976 mapping review
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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-49142CVE reference · exploit
- Acer Official HomepageCVE reference · product
- VulnCheck Advisory: Global Registration Service 1.0.0.3 - 'GREGsvc.exe' 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.