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CVE-2016-3099

24
FAUCET Score

CVE-2016-3099 describes a vulnerability in mod_ns within Red Hat Enterprise Linux Desktop, HPC Node, Server, and Workstation 7. This flaw allows remote attackers to bypass intended cipher restrictions, forcing the use of weaker encryption. With a CVSS score of 7.5 (High), it presents a significant integrity risk (I:H) due to its network-based attack vector (AV:N) and low attack complexity (AC:L), requiring no user interaction (UI:N). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*

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:H/A:N

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

Exploit Intelligence

EPSS Score
1.72%
Probability of exploitation in next 30 days
EPSS Percentile
75.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0172 is in the 58th percentile among its peer group of 51,485 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

No media coverage found for this CVE.

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 (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: mod_nss-0:1.0.14-7.el7
View patch
redhatvendor investigatingvia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Certificate System 8Fixed in: mod_nss
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: mod_nss
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: mod_nss

Vendor Advisories (1)

redhatCVE-2016-3099Low

mod_nss: Invalid handling of +CIPHER operator

Apr 5, 2016

References

lists.fedoraproject.org / pipermail/package-announce/2016-April/183102.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2016-April/183129.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2016-May/184345.html
Mailing ListThird Party Advisory
rhn.redhat.com / errata/RHSA-2016-2602.html
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingVendor Advisory