What is the CVSS score of CVE-2021-47780?

CVE-2021-47780 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Macro Expert are affected by CVE-2021-47780?

Organizations using Macro Expert 4.7 face notable risk from CVE-2021-47780 rated CVSS 7.8. Exploitation could compromise the security of affected deployments.

Is there a public PoC exploit available for CVE-2021-47780?

Yes, a public proof-of-concept exploit is available for CVE-2021-47780. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2021-47780?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

Macro Expert CVE-2021-47780

HIGH

Unquoted Search Path or Element (CWE-428)

2026-01-16 disclosure@vulncheck.com

RCE Macro Expert

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 21, 2026 - 22:24 vuln.today

Public exploit code

CVE Published

Jan 16, 2026 - 00:16 nvd

HIGH 7.8

DescriptionCVE.org

Macro Expert 4.7 contains an unquoted service path vulnerability that allows local users to potentially execute arbitrary code with elevated system privileges. Attackers can exploit the improperly configured service path to inject malicious executables that will be run with LocalSystem permissions during service startup.

AnalysisAI

Macro Expert versions up to 4.7 contains a vulnerability that allows attackers to potentially execute arbitrary code with elevated system privileges (CVSS 7.8).

Technical ContextAI

affects Macro Expert. Macro Expert 4.7 contains an unquoted service path vulnerability that allows local users to potentially execute arbitrary code with elevated system privileges. Attackers can exploit the improperly configured service path to inject malicious executables that will be run with LocalSystem permissions during service startup.

RemediationAI

Monitor vendor advisories for a patch.

CVE-2021-47780 vulnerability details – vuln.today

Back

Macro Expert CVE-2021-47780

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

Share

External POC / Exploit Code