Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2017-3733

26
FAUCET Score

CVE-2017-3733 is a high-severity vulnerability in OpenSSL versions prior to 1.1.0e, affecting both clients and servers. It allows a remote attacker to crash the application by manipulating the Encrypt-Then-Mac extension during a renegotiation handshake, leading to a denial of service. While no public exploit code or active exploitation has been observed, the vulnerability has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.1.0CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.1.0:*:*:*:*:*:*:*
1.1.0aCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.1.0a:*:*:*:*:*:*:*
1.1.0bCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.1.0b:*:*:*:*:*:*:*
1.1.0cCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.1.0c:*:*:*:*:*:*:*
1.1.0dCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.1.0d:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
12.87%
Probability of exploitation in next 30 days
EPSS Percentile
95.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.1287 is in the 94th percentile among its peer group of 51,466 CVEs.

Social Chatter

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

Vendor Advisories (1)

redhatCVE-2017-3733Important

openssl: Encrypt-Then-Mac renegotiation crash

Feb 16, 2017

References

github.com / openssl/openssl/commit/4ad93618d26a3ea23d36ad5498ff4f59eff3a4d2
h20566.www2.hpe.com / hpsc/doc/public/display
Third Party AdvisoryVDB Entry
openssl.org / news/secadv/20170216.txt
Vendor Advisory
oracle.com / technetwork/security-advisory/cpuapr2019-5072813.html
oracle.com / technetwork/security-advisory/cpujan2018-3236628.html
oracle.com / technetwork/security-advisory/cpuoct2017-3236626.html
securityfocus.com / bid/96269
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037846