CVE-2020-3992 kev+ ransomware in the critical feed json
OpenSLP as used in VMware ESXi (7.0 before ESXi_7.0.1-0.0.16850804, 6.7 before ESXi670-202010401-SG, 6.5 before ESXi650-202010401-SG) has a…
published 2020-10-20 6 y ago modified 2026-08-12 2 mo ago also EUVD-2020-25257
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Exploited
- added 2021-11-03, used in ransomware
- epss
- 83.0%
- EPSS 83.0% chance of exploitation in 30 days, percentile 99.6%
- public exploits
- 0
- none known
Summary
OpenSLP as used in VMware ESXi (7.0 before ESXi_7.0.1-0.0.16850804, 6.7 before ESXi670-202010401-SG, 6.5 before ESXi650-202010401-SG) has a use-after-free issue. A malicious actor residing in the management network who has access to port 427 on an ESXi machine may be able to trigger a use-after-free in the OpenSLP service resulting in remote code execution.
Patch / fix
cisa required action Apply updates per vendor instructions.
- vmware cloud_foundation 3.10.1.2, 4.1.0.1
Timeline
- Published
- CISA SSVC: exploitation active
- Added to CISA KEV
- CISA patch deadline
Known exploited
- Added
- 5 y ago
- Patch by
- 2022-05-03 (4 y ago)
- Ransomware
- Known to be used in ransomware campaigns
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- VMware, ESXi
- CISA name
- VMware ESXi OpenSLP Use-After-Free Vulnerability
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- yes
- Technical impact
- total
- Assessed
- 5 y ago
Exploit prediction
83.02% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Affected products
- n/a VMware ESXi
Classification
- Weakness
-
- CWE-416 Use After Free
- Technology feeds
References
-
vmware.com
/security/advisories/VMSA-2020-0023.html
patch, vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-20-1377/
third-party-advisory, vdb-entry
-
zerodayinitiative.com
/advisories/ZDI-20-1385/
third-party-advisory, vdb-entry
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3992
government-resource, us-government-resource
Sources
- CVE List CVE-2020-3992
- NVD CVE-2020-3992
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.