Vulnerability in Kaseya Virtual System Administrator
CVE-2018-20753
Kaseya VSA RMM before R9.3 9.3.0.35, R9.4 before 9.4.0.36, and R9.5 before 9.5.0.5 allows unprivileged remote attackers to execute PowerShell payloads on all managed devices. In January 2018, attackers actively exploited this vulnerability in the wild.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.296 (98.2th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.293 · newest: 0.296 · change: +0.002
Affected products
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- blog.huntresslabs.com/deep-dive-kaseya-vsa-mining-payload-c0ac839a0e88 (Exploit, Third Party Advisory)
- helpdesk.kaseya.com/hc/en-gb/articles/360000333152 (Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2018-20753?
- CVE-2018-20753 is a critical-severity vulnerability in Kaseya Virtual System Administrator. CVSS score: 9.8/10. Published 2019-02-05.
- How severe is CVE-2018-20753?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-20753 known to be exploited?
- Yes. CVE-2018-20753 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-04-13), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.