Security readout for executives and security teams
Plain-English summary
CVE-2019-1900 is an unauthenticated remote denial-of-service issue in Cisco Integrated Management Controller. A malformed web request can crash the IMC web server, potentially disrupting management access. Availability impact is high, and restart may require physical access, increasing operational urgency for remote or unmanned infrastructure.
Executive priority
Treat this as a high-priority availability risk for server management infrastructure, not a data-theft issue. Urgency rises where IMC is reachable beyond trusted admin networks or where physical restart would cause prolonged outage.
Technical view
The issue affects the Cisco IMC web server in Cisco Unified Computing System management software. It stems from insufficient validation of user-supplied input on the web interface and is mapped to CWE-476. Exploitation requires network access, no authentication, low complexity, and no user interaction; impact is availability only.
Likely exposure
Exposure is most relevant where Cisco IMC web management interfaces are reachable over a network, especially from untrusted or broadly accessible segments. The bundle does not identify exact affected versions, so teams must confirm exposure against Cisco guidance and their asset inventory.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The documented attack path is a crafted HTTP request to certain affected web endpoints, causing the web server process to crash. No confidentiality or integrity impact is described.
Researcher notes
Evidence is limited to CVE and Cisco advisory metadata in the bundle. Affected versions are unspecified here. Validation should focus on asset/version mapping, management-plane exposure, and crash indicators, without attempting disruptive proof-of-concept testing in production.
Mitigation direction
- Review Cisco's advisory for affected releases, fixed software, and workarounds.
- Identify Cisco UCS systems using Cisco IMC management software.
- Restrict IMC web management access to trusted administrative networks.
- Prioritize remediation for remote sites where physical restart is difficult.
- Monitor Cisco guidance for version-specific update instructions.
Validation and detection
- Inventory Cisco IMC web interfaces and their network reachability.
- Compare installed IMC management software versions with Cisco's advisory.
- Confirm unauthenticated access is blocked from untrusted networks.
- Check operational logs for unexpected IMC web server crashes.
- Verify restart procedures for affected systems, including remote locations.
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-476: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCVE-2019-1900 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
- 7.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/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:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.5HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20190821 Cisco Integrated Management Controller Unauthenticated 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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.