Security readout for executives and security teams
This vulnerability can let someone on the same local network segment crash certain Cisco network devices by abusing Cisco Discovery Protocol. The business risk is service disruption, not data theft. Remote internet exploitation is not indicated by the provided sources. Exposure is limited to attackers in the same broadcast domain as an affected device. The bundle names Cisco FXOS, IOS XR, and NX-OS, while the structured affected entry only lists Cisco IOS XR with unspecified versions. Treat as high priority for network infrastructure where local access is plausible, such as campus, branch, data center, or shared Layer 2 environments. It threatens availability of Cisco devices but requires adjacent network position. Mitigation focus: Check Cisco advisory for affected versions and fixed release guidance.; Inventory Cisco FXOS, IOS XR, and NX-OS assets using Cisco Discovery Protocol.; Prioritize devices on shared, untrusted, or physically accessible Layer 2 segments..
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
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ATT&CK lookup starting points
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CWE-190: Exact CWE lookup
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Open ATT&CK lookupCVE-2020-3120 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
- 7.4 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/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:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H2.84Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.4HighVector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200205 Cisco FXOS, IOS XR, and NX-OS Software Cisco Discovery Protocol Denial of Service 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.
Integer Overflow or Wraparound
Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.