CVE-2020-9840
In SwiftNIO Extras before 1.4.1, a logic issue was addressed with improved restrictions.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
In SwiftNIO Extras before 1.4.1, a logic issue was addressed with improved restrictions.
- Record
CVE-2020-9840- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
CVE List No score
In SwiftNIO Extras before 1.4.1, a logic issue was addressed with improved restrictions.
- Record
CVE-2020-9840- Updated
- 2026-11-02
EUVDEUVD-2020-30619 No score
In SwiftNIO Extras before 1.4.1, a logic issue was addressed with improved restrictions.
- Record
EUVD-2020-30619- Updated
- 2026-11-03
OSV
In SwiftNIO Extras before 1.4.1, a logic issue was addressed with improved restrictions.
- Record
CVE-2020-9840- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products | EUVD | |
| first indexed | CVE List, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-9840 is a high vulnerability (CVSS 7.5) in Swift Swiftnio Extras, published May 11, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.02%, the 63rd percentile. No source names a fixed version.