VMware · vCenter Server

CVE-2021-22005

VMware vCenter Server File Upload Vulnerability

Exploited in attacks Used by ransomware Critical 9.8 Attack chance: >99.9%

What it is

The vCenter Server contains an arbitrary file upload vulnerability in the Analytics service. A malicious actor with network access to port 443 on vCenter Server may exploit this issue to execute code on vCenter Server by uploading a specially crafted file.

CISA: VMware vCenter Server contains a file upload vulnerability in the Analytics service that allows a user with network access to port 443 to execute code.

What to do

Apply updates per vendor instructions.

Deadline for US federal agencies: November 17, 2021

Added to the CISA list: November 3, 2021
Published: September 23, 2021
Severity: Critical 9.8 CVSS 3.1
Chance of attacks in the next 30 days (EPSS): >99.9% in the top 0.1% of all known vulnerabilities
Weakness: CWE-23
More details: NVD · CVE.org · CISA

All references (2)

More exploited flaws from VMware

Added	Vulnerability	Product	Severity	Attack chance
Nov 20, 2024	Heap-Based Buffer OverflowCVE-2024-38812	vCenter Server	Critical 9.8	55%
Nov 20, 2024	Privilege EscalationCVE-2024-38813	vCenter Server	High 7.5	17%
Jul 17, 2024	Incorrect Default File Permissions Vulnerability CVE-2022-22948	vCenter Server	Medium 6.5	13%
Jan 22, 2024	Out-of-Bounds WriteCVE-2023-34048	vCenter Server	Critical 9.8	99.2%
Jan 10, 2022	Improper Access ControlCVE-2021-22017	vCenter Server	Medium 5.3	49%
Nov 3, 2021	Information DisclosureCVE-2020-3952	vCenter Server	Critical 9.8	90%
Nov 3, 2021	Remote Code ExecutionCVE-2021-21972used by ransomware	vCenter Server	Critical 9.8	99.9%
Nov 3, 2021	Improper Input ValidationCVE-2021-21985used by ransomware	vCenter Server	Critical 9.8	>99.9%

All of them →

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.