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CVE-2016-6394

30
FAUCET Score

CVE-2016-6394 describes a critical session fixation vulnerability in Cisco Firepower Management Center and FireSIGHT System Software up to version 6.1.0. This flaw allows remote attackers to hijack web sessions by manipulating session identifiers. With a CVSS score of 9.1 (CRITICAL), the vulnerability is easily exploitable over the network with low complexity, potentially leading to full compromise of confidentiality and integrity. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
5.2.0CPE matchmatch criteria
cpe:2.3:a:cisco:firesight_system_software:5.2.0:*:*:*:*:*:*:*
5.2.0.1CPE matchmatch criteria
cpe:2.3:a:cisco:firesight_system_software:5.2.0.1:*:*:*:*:*:*:*
5.2.0.2CPE matchmatch criteria
cpe:2.3:a:cisco:firesight_system_software:5.2.0.2:*:*:*:*:*:*:*
5.2.0.3CPE matchmatch criteria
cpe:2.3:a:cisco:firesight_system_software:5.2.0.3:*:*:*:*:*:*:*
5.2.0.4CPE matchmatch criteria
cpe:2.3:a:cisco:firesight_system_software:5.2.0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.45%
Probability of exploitation in next 30 days
EPSS Percentile
70.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0145 is in the 57th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20160907-fsmc
Vendor Advisory
securityfocus.com / bid/92825
securitytracker.com / id/1036757