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CVE-2020-3410

26
FAUCET Score

CVE-2020-3410 is a high-severity authentication bypass vulnerability affecting Cisco Firepower Management Center (FMC) Software's Common Access Card (CAC) authentication feature. An unauthenticated, remote attacker with a valid CAC can exploit incorrect session invalidation to gain unauthorized access to the FMC system with the privileges of a currently logged-in CAC user. The vulnerability has a CVSS score of 8.1, indicating high impact on confidentiality, integrity, and availability, but requires high attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
6.6.0CPE matchmatch criteria
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.0:*:*:*:*:*:*:*
6.6.0.1CPE matchmatch criteria
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.0.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.14%
Probability of exploitation in next 30 days
EPSS Percentile
63.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0114 is in the 26th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 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

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-cacauthbyp-NCLGZm3Q
Vendor Advisory