CVE-2019-14899
A vulnerability was discovered in Linux, FreeBSD, OpenBSD, MacOS, iOS, and Android that allows a malicious access point, or an adjacent…
- 7.4HighCVSS base score
- 0.84%Exploitation in 30 daysEPSS · top 42% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A vulnerability was discovered in Linux, FreeBSD, OpenBSD, MacOS, iOS, and Android that allows a malicious access point, or an adjacent user, to determine if a connected user is using a VPN, make positive inferences about the websites they are visiting, and determine the correct sequence and acknowledgement numbers in use, allowing the bad actor to inject data into the TCP stream. This provides everything that is needed for an attacker to hijack active connections inside the VPN tunnel.
Timeline
ID reserved
By redhat
- 4 months later
· 4 months later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.0 | High7.4 | CVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.4 | CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.84% · top 42% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
Affected products
References
References15
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://openvpn.net/security-advisory/no-flaws-found-in-openvpn-software/ (opens in a new tab)x_refsource_MISCx_transferred
- https://support.apple.com/kb/HT211288 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.apple.com/kb/HT211290 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.apple.com/kb/HT211289 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 20200717 APPLE-SA-2020-07-15-3 tvOS 13.4.8 (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- 20200717 APPLE-SA-2020-07-15-2 macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- 20200717 APPLE-SA-2020-07-15-1 iOS 13.6 and iPadOS 13.6 (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- [oss-security] 20200813 Blind in/on-path attacks against VPN-tunneled connections (CVE-2019-14899 follow-up) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://support.apple.com/kb/HT211850 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20201007 Re: [CVE-2019-14899] Inferring and hijacking VPN-tunneled TCP connections. (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://support.apple.com/kb/HT211931 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 20201115 APPLE-SA-2020-11-13-3 Additional information for APPLE-SA-2020-09-16-1 iOS 14.0 and iPadOS 14.0 (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- 20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1 (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- [oss-security] 20210704 Re: Blind in/on-path attacks against VPN-tunneled connections (CVE-2019-14899 follow-up) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-6005 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-14899)Record last updated .