CVE-2021-36942

Windows LSA Spoofing Vulnerability

CVSS v3.1

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

CVSS v3.1

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

CVSS v2.0

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N

EPSS

66.02% chance of exploitation in the next 30 days, 99th percentile

CISA KEV

added 2021-11-03, used in ransomware campaigns

Published

2021-08-12

Updated

2026-08-10

Proof-of-concept exploits (5)

• Royalboy2000/codeRDPbreaker1★ · 2023-08-05
• XiaoliChan/PetitPotam-V227★ · 2023-03-21
• brettgus/PetitPotam0★ · 2025-02-26
• ly4k/PetitPotam226★ · 2021-10-17
• topotam/PetitPotam2268★ · 2024-08-15

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/dcerpc/petitpotam.rb

References

• CVE Record
• NVD entry

Related

• CVE-2019-0708
• CVE-2021-34527
• CVE-2021-42278
• CVE-2021-42287
• CVE-2020-0601
• CVE-2021-4034