High severity · published Jan 15, 2026
CVE-2021-47780
Macro Expert 4.7 - Unquoted Service Path
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
Macro Expert · Macro-Expert
4.7 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-47780
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-47780
Product
http://www.macro-expert.com/
Exploit
https://www.exploit-db.com/exploits/50431
Third Party Advisory
https://www.vulncheck.com/advisories/macro-expert-unquoted-service-path
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