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CVE-2016-0701

64
FAUCET Score

CVE-2016-0701 describes a vulnerability in OpenSSL versions 1.0.2 before 1.0.2f, where the DH_check_pub_key function fails to properly validate prime numbers used in Diffie-Hellman key exchange. This flaw allows a remote attacker, with high attack complexity, to potentially discover a private DH exponent through multiple handshakes, leading to a low confidentiality impact (CVSS 3.7 Low). While no public exploit code is available and it is not listed in CISA's Known Exploited Vulnerabilities catalog, the CVE is on the "Hot List" and has garnered significant community discussion and media attention.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.2CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2:*:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2:beta1:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2:beta2:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2:beta3:*:*:*:*:*:*
1.0.2aCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2a:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

3.7LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
83.64%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.8365 is in the 100th percentile among its peer group of 1,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.

Media Mentions

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

Remediation

Vendor Advisories (1)

redhatCVE-2016-0701Moderate

OpenSSL: DH small subgroups

Jan 28, 2016

References

intothesymmetry.blogspot.com / 2016/01/openssl-key-recovery-attack-on-dh-small.html
kb.juniper.net / InfoCenter/index
lists.fedoraproject.org / pipermail/package-announce/2016-January/176373.html
lists.opensuse.org / opensuse-security-announce/2016-03/msg00009.html
cert-portal.siemens.com / productcert/pdf/ssa-412672.pdf
git.openssl.org
git.openssl.org
h20566.www2.hpe.com / hpsc/doc/public/display
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
security.gentoo.org / glsa/201601-05
kb.cert.org / vuls/id/257823
oracle.com / security-alerts/cpuapr2020.html
oracle.com / security-alerts/cpujan2020.html
oracle.com / security-alerts/cpujul2020.html
oracle.com / security-alerts/cpuoct2020.html
oracle.com / technetwork/security-advisory/cpujul2019-5072835.html
openssl.org / news/secadv/20160128.txt
Vendor Advisory
oracle.com / technetwork/security-advisory/cpujul2016-2881720.html
oracle.com / technetwork/security-advisory/cpuoct2017-3236626.html
securityfocus.com / bid/82233
securityfocus.com / bid/91787
securitytracker.com / id/1034849
ubuntu.com / usn/USN-2883-1