CVE-2021-47780

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 v4.0

8.5 HIGHCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

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

EPSS

0.23% chance of exploitation in the next 30 days, 14th percentile

Published

2026-01-15

Updated

2026-03-05

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/50431

References

• CVE Record
• NVD entry

Related

• CVE-2021-47779
• CVE-2021-47781
• CVE-2021-47778
• CVE-2021-47782
• CVE-2021-47777
• CVE-2021-47783