CVE-2019-16516 — An issue was discovered in ConnectWise Control (formerly known as ScreenConnect)
An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a user enumeration vulnerability, allowing an unauthenticated attacker to determine with certainty if an account exists for a given username.
Published
2020-01-23T17:24:10.000Z
Last modified
2024-08-05T01:17:40.215Z
01What is this vulnerability?
An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a user enumeration vulnerability, allowing an unauthenticated attacker to determine with certainty if an account exists for a given username.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2020-01-23T17:24:10.000Z
- Last modified: 2024-08-05T01:17:40.215Z
09References
- know.bishopfox.com — https://know.bishopfox.com/advisories
- know.bishopfox.com — https://know.bishopfox.com/advisories/connectwise-control
- blog.huntresslabs.com — https://blog.huntresslabs.com/validating-the-bishop-fox-findings-in-connectwise-…
- www.crn.com — https://www.crn.com/news/managed-services/connectwise-control-msp-security-vulne…
- www.crn.com — https://www.crn.com/slide-shows/managed-services/connectwise-control-attack-chai…
- packetstormsecurity.com — http://packetstormsecurity.com/files/165432/ConnectWise-Control-19.2.24707-Usern…
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