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CVE-2019-14899

25
FAUCET Score

CVE-2019-14899 is a vulnerability affecting Linux, FreeBSD, OpenBSD, MacOS, iOS, and Android that allows an adjacent attacker to infer VPN usage, identify visited websites, and determine TCP sequence numbers, enabling data injection and connection hijacking within VPN tunnels. Rated 7.4 HIGH, this vulnerability has a low attack complexity but requires adjacent access and user interaction, leading to high impacts on confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:-:*:*:*:*:*:*:*
< 13.6CPE matchmatch criteria
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
< 13.6CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.4HIGH

CVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.5
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.84%
Probability of exploitation in next 30 days
EPSS Percentile
54.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0084 is in the 82nd percentile among its peer group of 18 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.4 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2019-14899Important

VPN: an attacker can inject data into the TCP stream which allows a hijack of active connections inside the VPN tunnel

Dec 4, 2019

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
seclists.org / fulldisclosure/2020/Dec/32
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2020/Jul/23
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2020/Jul/24
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2020/Jul/25
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2020/Nov/20
Mailing ListThird Party Advisory
openvpn.net / security-advisory/no-flaws-found-in-openvpn-software
Third Party Advisory
support.apple.com / kb/HT211288
Third Party Advisory
support.apple.com / kb/HT211289
Third Party Advisory
support.apple.com / kb/HT211290
Third Party Advisory
support.apple.com / kb/HT211850
Third Party Advisory
support.apple.com / kb/HT211931
Third Party Advisory
openwall.com / lists/oss-security/2020/08/13/2
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2020/10/07/3
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2021/07/05/1
Mailing ListThird Party Advisory