CVE-2021-43890: Microsoft Windows AppX Installer Spoofing Vulnerability

CISA Known Exploited Vulnerability (KEV)

Description

Microsoft Windows AppX Installer contains a spoofing vulnerability which has a high impacts to confidentiality, integrity, and availability.

Required action (CISA)

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-43890

Weakness behind it

CISA has not recorded a CWE for this entry, so the CVE → CWE → CAPEC → ATT&CK chain cannot be walked from here. That is a gap in the catalogue, not evidence the vulnerability has no weakness class — check the NVD record below.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-43890
• KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog