CVE-2018-20753 kev+ ransomware in the critical feed json
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 PowerShe…
published 2019-02-05 7 y ago modified 2026-08-13 2 mo ago also EUVD-2018-13296
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Exploited
- added 2022-04-13, used in ransomware
- epss
- 29.6%
- EPSS 29.6% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
cisa required action Apply updates per vendor instructions.
- kaseya virtual_system_administrator 9.3.0.35, 9.4.0.36, 9.5.0.5
Timeline
- Published
- Added to CISA KEV
- CISA SSVC: exploitation active
- CISA patch deadline
Known exploited
- Added
- 4 y ago
- Patch by
- 2022-05-04 (4 y ago)
- Ransomware
- Known to be used in ransomware campaigns
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Kaseya, Virtual System/Server Administrator (VSA)
- CISA name
- Kaseya VSA Remote Code Execution Vulnerability
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- yes
- Technical impact
- total
- Assessed
- 4 y ago
Exploit prediction
29.55% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- blog.huntresslabs.com https://blog.huntresslabs.com/deep-dive-kaseya-vsa-mining-payload-c0ac839a0e88 referenced PoC, tagged "exploit" by a source, unverified
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 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
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
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-20753
government-resource, us-government-resource
Sources
- CVE List CVE-2018-20753
- NVD CVE-2018-20753
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.