Security readout for executives and security teams
This flaw can let someone with SNMP access disrupt affected Cisco Small Business switches. A successful attack can drive CPU use to 100%, stop SNMP processing, and potentially stop traffic forwarding. Manual intervention may be needed to restore normal operation. Exposure is most likely where affected Cisco Small Business Sx200, Sx300, Sx500, ESW2, Sx250, Sx350, or Sx550 switches run SNMP and accept authenticated remote SNMP traffic. Internet exposure is not stated in the sources. Prioritize remediation for affected switches supporting business-critical networks. The issue is availability-focused, but impact can include traffic loss and hands-on recovery, making it operationally significant even without evidence of active exploitation. Mitigation focus: Apply Cisco firmware updates that address CVE-2019-1806.; Use Cisco’s advisory to map each switch model to the correct fixed firmware.; Review SNMP exposure and keep management access limited to authorized administrators..
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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Open ATT&CK lookupCVE-2019-1806 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
- 7.7 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/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:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H3.14Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.7HighVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20190515 Cisco Small Business Series Switches Simple Network Management 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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.