CVE-2016-3099 [High] | Security Vulnerability in Enterprise Linux Desktop

CVE-2016-3099 is rated Moderate Risk (57.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.79%). EPSS rose +1.42% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.37%	1.79%	+1.42%
2	2026-02-10	0.28%	0.37%	+0.09%
3	2025-07-13	—	0.28%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.37%

1.79%

+1.42%

2026-02-10

0.28%

0.37%

+0.09%

2025-07-13

—

0.28%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.0	HIGH	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	3.9	3.6	[email protected]
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:N/I:P/A:N` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:N) No availability impact.	10.0	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.0

HIGH

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

3.9

3.6

[email protected]

5.0

2.0

MEDIUM

AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:N): No availability impact.

10.0

2.9

[email protected]

OS Trackers for CVE-2016-3099

vendor	priority	summary	link
`redhat`	low	—	https://access.redhat.com/security/cve/CVE-2016-3099
`suse`	medium	CVE-2016-3099 severity moderate: SUSE including 9 source package names (apache2-mod_nss, apache2-mod_nss-1.0.14-10.14.3, …), 24 product×package rows across 24 product lines (SUSE Liberty Linux 7, SUSE Linux Enterprise High Performance Computing 12 SP5, … (24 product lines)): Fixed 19, Known Not Affected 5.	https://www.suse.com/security/cve/CVE-2016-3099/
`ubuntu`	medium	CVE-2016-3099 medium priority: Ubuntu including 1 source packages (libapache2-mod-nss), 22 status rows across 22 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, mantic, noble, oracular, plucky, precise, questing, trusty, upstream, wily, xenial, yakkety, zesty): DNE 13, ignored 5, not-affected 2, needed 1, needs-triage 1.	https://ubuntu.com/security/CVE-2016-3099

Affected software / configurations for CVE-2016-3099

Vendor	Product	Version	Raw CPE
redhat	enterprise_linux_desktop	7.0	cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:::::::*
redhat	enterprise_linux_hpc_node	7.0	cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:::::::*
redhat	enterprise_linux_server	7.0	cpe:2.3:o:redhat:enterprise_linux_server:7.0:::::::*
redhat	enterprise_linux_workstation	7.0	cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:::::::*

References for CVE-2016-3099

URL	Tags
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183102.html	Mailing List Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/183129.html	Mailing List Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184345.html	Mailing List Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-2602.html	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1319052	Issue Tracking Vendor Advisory

URL

CVE-2016-3099

Exploit prediction scoring system (EPSS) score for CVE-2016-3099

Common vulnerability scoring system (CVSS) metrics for CVE-2016-3099

Weakness enumeration for CVE-2016-3099

OS Trackers for CVE-2016-3099

Affected software / configurations for CVE-2016-3099

References for CVE-2016-3099