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CVE-2019-5101

20
FAUCET Score

CVE-2019-5101 is an information leak vulnerability affecting the ustream-ssl library in OpenWrt versions 18.06.4 and 15.05.1. The flaw allows an attacker to perform a man-in-the-middle attack by presenting an invalid SSL certificate, which the affected software fails to properly act upon. This enables the theft of data sent by the client during the initial connection. The vulnerability has a CVSS v3.1 score of 5.9 (Medium), indicating a network-based attack with high impact on confidentiality and high attack complexity, requiring no user interaction. There is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
15.05.1CPE matchmatch criteria
cpe:2.3:o:openwrt:openwrt:15.05.1:*:*:*:*:*:*:*
18.06.4CPE matchmatch criteria
cpe:2.3:o:openwrt:openwrt:18.06.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.0MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.78%
Probability of exploitation in next 30 days
EPSS Percentile
52.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0078 is in the 11th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

talosintelligence.com / vulnerability_reports/TALOS-2019-0893
ExploitThird Party Advisory