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CVE-2017-5066

21
FAUCET Score

CVE-2017-5066 is a medium-severity vulnerability affecting Google Chrome on Mac, Windows, Linux, and Android, allowing a remote attacker to bypass X.509 certificate validation through a crafted HTML page due to insufficient signature handling. This vulnerability has a CVSS score of 6.5, indicating a network-based attack requiring user interaction, with a high impact on integrity but no impact on confidentiality or availability. There is no public exploit code available (Metasploit, Nuclei, ExploitDB), and it is not listed in CISA's KEV catalog, suggesting it is not actively exploited. Despite this, it has received some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 58.0.3029.81CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
< 58.0.3029.83CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.73%
Probability of exploitation in next 30 days
EPSS Percentile
50.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0073 is in the 57th percentile among its peer group of 26,234 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 SupplementaryFixed in: chromium-browser-0:58.0.3029.81-1.el6_9
View patch

Vendor Advisories (1)

redhatCVE-2017-5066Moderate

chromium-browser: incorrect signature handing in networking

Apr 19, 2017

References

access.redhat.com / errata/RHSA-2017:1124
chromereleases.googleblog.com / 2017/04/stable-channel-update-for-desktop.html
crbug.com / 690821
security.gentoo.org / glsa/201705-02
securityfocus.com / bid/97939
securitytracker.com / id/1038317