Security readout for executives and security teams
Plain-English summary
CVE-2020-3410 affects Cisco Firepower Management Center when CAC authentication is used. A remote unauthenticated attacker with a valid CAC could bypass authentication because CAC sessions are not invalidated correctly, potentially taking on privileges of a currently logged-in CAC user. That can expose a central security management platform to unauthorized control.
Executive priority
Treat this as a high-priority exposure check for environments using CAC-enabled Cisco FMC. FMC controls security infrastructure, so unauthorized access could affect confidentiality, integrity, and availability. Prioritize inventory, vendor-version validation, and access restriction while confirming Cisco remediation guidance.
Technical view
The issue is CWE-287 in Cisco FMC CAC authentication. CVSS 3.1 is 8.1, AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. Successful exploitation requires a CAC-based authentication attempt against an affected FMC and can grant access with privileges of an active CAC-authenticated user.
Likely exposure
Organizations using Cisco Firepower Management Center with CAC authentication enabled are the relevant population. Exposure is higher where FMC is reachable from untrusted networks or many CAC-authenticated users keep active sessions. The provided sources do not list affected version ranges.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation is remote and unauthenticated, but high complexity because the attacker needs a valid CAC and the outcome depends on an active CAC-authenticated user session.
Researcher notes
Evidence supports an authentication bypass caused by incorrect CAC session invalidation. The attacker must possess a valid CAC and may inherit privileges of a currently logged-in CAC user. The provided bundle lacks fixed-version details, exploit telemetry, and practical detection indicators.
Mitigation direction
- Review Cisco's advisory for affected and fixed FMC releases.
- Apply Cisco-provided updates or workarounds if listed for your FMC version.
- Restrict network access to FMC management interfaces to trusted administrators.
- Review CAC authentication configuration and session management risk with Cisco guidance.
Validation and detection
- Inventory Cisco FMC deployments and identify where CAC authentication is enabled.
- Compare deployed FMC versions against the Cisco advisory's affected release information.
- Confirm FMC management interfaces are not exposed to untrusted networks.
- Review authentication logs for unusual CAC access patterns or session anomalies.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-287: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-3410 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20201021 Cisco Firepower Management Center Software Common Access Card Authentication Bypass VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authentication
Improper Authentication represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.