CVE-2021-21973
Exploited in the wild. In CISA KEV since 2022‑03‑07. Fixed in 3.10.1.2.
What to do
Find your product and version, then upgrade to the build on the right.
- n/a VMware vCenter ServerAffected: 7.x before 7.0 U1cUpgrade to: not statedAffected: 6.7 before 6.7 U3lUpgrade to: not statedAffected: 6.5 before 6.5 U3nUpgrade to: not statedStated by: CVE record
- n/a VMware Cloud FoundationAffected: 4.x before 4.2Upgrade to: not statedAffected: 3.x before 3.10.1.2Upgrade to: not statedStated by: CVE record
- Vmware Cloud FoundationAffected: ≥ 3.0, < 3.10.1.2Upgrade to: 3.10.1.2Stated by: NVD
- Broadcom Inc. VMware Cloud FoundationAffected: от 3.0 до 3.10.1.2Upgrade to: not statedStated by: BDU
- Broadcom Inc. VMware vCenter ServerAffected: от 7.0 до 7.0 U1cUpgrade to: not statedStated by: BDU
Versions as the sources state them. Full version matrix after sign-in
Coverage timeline
0 publishersAdded to CISA KEV catalog
Sourced from public security reporting — each date is when it was published, not when it happened.
What it is
From the CVE record
The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. This affects: VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Listed as exploited in the wild since 2022-03-07.
US federal agencies must remediate by 2022-03-21.
Apply updates per vendor instructions.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
88% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
9 events over 1947 days, from the signal feeds we watch.
- OpenVAS check added
- EPSS band changecritical → high
- Nuclei check added
- Patch availablerecord updated
- Added to CISA KEV
- Publishedweakness classified, att&ck mapped
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Scored 5.3 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality LowSome restricted information is disclosed, but limited in scope
- Integrity NoneNo integrity impact
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Command and ControlT1090Proxyhigh confidence
- Initial AccessT1190Exploit Public-Facing Applicationmedium confidence
Sources
Watch the software you run.
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