CVE-2017-18362
CVE-2017-18362 is a security flaw in Kaseya Virtual System/Server Administrator (VSA), remote-support software IT providers use to manage their customers’ computers. Attackers can read or change the database behind Kaseya Virtual System/Server Administrator (VSA) from anywhere, without logging in. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 24 May 2022, and says ransomware gangs have used it.[1]
Kaseya Virtual System/Server Administrator (VSA) is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff.
Description
CISA calls it a VSA SQL injection in Kaseya Virtual System/Server Administrator (VSA). In its words: “ConnectWise ManagedITSync integration for Kaseya VSA is vulnerable to unauthenticated remote commands that allow full direct access to the Kaseya VSA database.”[1]
The CVE record adds: “ConnectWise ManagedITSync integration through 2017 for Kaseya VSA is vulnerable to unauthenticated remote commands that allow full direct access to the Kaseya VSA database. In February 2019, attackers have actively exploited this in the wild to download and execute ransomware payloads on all endpoints managed by the VSA server. If the ManagedIT.asmx page is available via the Kaseya VSA web interface, anyone with access to the page is able to run arbitrary SQL queries, both read and write, without authentication.”[2]
The underlying weakness is SQL injection (CWE-89), in MITRE’s list of common software weaknesses.
It scores 9.8 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by NVD using CVSS 3.1.[2]
Affected versions
NVD’s record doesn’t list version ranges for it. CISA names the product as Kaseya Virtual System/Server Administrator (VSA).
Most families won’t have Kaseya Virtual System/Server Administrator (VSA); it’s for whoever looks after IT at work.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 24 May 2022, 1,204 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 14 Jun 2022 to fix it.[1] CISA says ransomware gangs have used it.
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 87%. That’s in the top 1% of the flaws it scores.[3]
CISA assesses it as automatable: attackers can run it against many targets at once.
CISA doesn’t say who was attacked, or how.
Fix
CISA’s required action: “The impacted product is end-of-life and should be disconnected if still in use.”[1]
- Check whether you use it.Kaseya Virtual System/Server Administrator (VSA) is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
- Send this page to your IT person.Ask them to confirm it’s fixed, or not in use. CISA gave US government agencies until 14 Jun 2022 to fix it.
- If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.
You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 9.8.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks, noting that ransomware gangs have used it.[1] | |
| CISA’s deadline for US government agencies to fix it.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at 87%.[3] |
See also
Other Kaseya Virtual System/Server Administrator (VSA) flaws
- CVE-2018-20753: VSA remote code execution ·
- CVE-2021-30116: information disclosure ·
Other SQL injection flaws
- CVE-2026-114625, Arista VeloCloud Orchestrator: SQL injection ·
- CVE-2026-76461, Cisco Secure Email Gateway: SQL injection ·
- CVE-2026-9586, Sangoma Switchvox: SQL injection ·
- CVE-2026-72898, Metabase: SQL injection ·
- CVE-2026-60137, WordPress Core: SQL injection ·
Added the same day
- CVE-2018-8611, Microsoft Windows: kernel privilege escalation ·
- CVE-2018-19953, QNAP Network Attached Storage (NAS): NAS file station cross-site scripting ·
- CVE-2018-19949, QNAP Network Attached Storage (NAS): NAS file station command injection ·
- CVE-2018-19943, QNAP Network Attached Storage (NAS): NAS file station cross-site scripting ·
- CVE-2017-8543, Microsoft Windows: search remote code execution ·
Every Kaseya flaw on CISA’s list · Everything added in May 2022
References
- ^ Cybersecurity and Infrastructure Security Agency. “Kaseya VSA SQL Injection Vulnerability”. Known Exploited Vulnerabilities Catalog, added 24 May 2022.
- ^ National Institute of Standards and Technology. “CVE-2017-18362 Detail”. National Vulnerability Database, published 5 Feb 2019.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.868, percentile 99.7, 31 Oct 2026.
- CVE Program. “CVE-2017-18362”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.