Security readout for executives and security teams
This Cisco IOS XR SSH issue can let a logged-in remote user appear as, or interact with, two different usernames during authentication. Business risk is mainly around unreliable audit trails, user discovery, and possible command authorization bypass in some circumstances. The source bundle does not show active exploitation or detailed fixed-version information. Exposure is limited to Cisco IOS XR Software devices where SSH management access is available to authenticated users. The bundle lists affected versions as unspecified, so teams must verify device releases against Cisco’s advisory before assuming exposure or non-exposure. Treat this as a medium-priority network infrastructure issue. It is not shown as actively exploited, but it can weaken audit reliability and authorization controls on critical routing platforms. Prioritize verification on internet-reachable or broadly reachable management interfaces. Mitigation focus: Review Cisco’s advisory for affected releases, fixed software, and vendor workarounds.; Restrict SSH management access to trusted administrative networks and users.; Apply least-privilege command authorization for IOS XR administrative accounts..
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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Open ATT&CK lookupCVE-2019-1842 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.4 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
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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:U/C:L/I:L/A:N2.82.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.4MediumVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20190605 Cisco IOS XR Software Secure Shell Authentication 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 Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.