Security readout for executives and security teams
Plain-English summary
CVE-2020-3302 is an authenticated web UI flaw in Cisco Firepower Management Center. A logged-in remote attacker could upload a specially crafted file and overwrite files on the appliance. The main business risk is disruption or unauthorized configuration/system changes to a security management platform, not direct unauthenticated compromise.
Executive priority
Treat this as a moderate-priority security platform issue. It requires credentials, but successful misuse could affect the system managing firewall and threat-defense operations. Prioritize patch verification and administrative access control.
Technical view
Cisco describes insufficient input validation in FMC Software’s web UI. The CVSS 3.0 vector is AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H, scoring 6.8. Impact is high integrity and availability loss, with no confidentiality impact stated.
Likely exposure
Exposure is limited to organizations running Cisco Firepower Management Center with web UI access available to authenticated users. The source bundle does not provide affected or fixed version ranges, so version exposure must be checked against Cisco’s advisory.
Exploitation context
The provided data does not show CISA KEV listing or active exploitation. Exploitation requires network access to the FMC web UI and valid low-privileged credentials, with high attack complexity according to the CVSS vector.
Researcher notes
Evidence is limited to the CVE record details and Cisco advisory reference in the source bundle. No affected version table, fixed release, proof of exploitation, or vendor mitigation detail was provided here beyond the advisory URL.
Mitigation direction
- Review Cisco’s advisory for affected and fixed FMC releases.
- Upgrade or patch FMC according to Cisco’s published guidance.
- Restrict FMC web UI access to trusted administrative networks.
- Limit FMC accounts to required administrators and least privilege.
- Monitor FMC for unexpected file changes or upload activity.
Validation and detection
- Inventory all Cisco FMC instances and software versions.
- Compare each version with Cisco’s advisory applicability guidance.
- Confirm FMC web UI is not broadly reachable.
- Review administrative accounts for unnecessary access.
- Check logs for suspicious uploads or file overwrite indicators.
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
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2020-3302 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
- Medium
- CVSS
- 6.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/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:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H1.65.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.8MediumVector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200506 Cisco Firepower Management Center File Overwrite 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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.