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Ios XeOperating system · Cisco

CVE-2019-1862

HIGH · 7.2 CVSS v3.0 Published 2019-05-13
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
78/100
Remediation priority · High
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A vulnerability in the web-based user interface (Web UI) of Cisco IOS XE Software could allow an authenticated, remote attacker to execute commands on the underlying Linux shell of an affected device with root privileges. The vulnerability occurs because the affected software improperly sanitizes user-supplied input. An attacker who has valid administrator access to an affected device could exploit this vulnerability by supplying a crafted input parameter on a form in the Web UI and then submitting that form. A successful exploit could allow the attacker to run arbitrary commands on the device with root privileges, which may lead to complete system compromise.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

This is an authenticated command injection vulnerability in Cisco IOS XE Web UI where improper input sanitization allows a valid administrator to inject arbitrary Linux commands through form parameters, executing them with root privileges on the underlying operating system.

MitigationUpgrade Cisco IOS XE to a version that addresses this vulnerability. Restrict administrative access to the Web UI to trusted personnel only until the patch can be applied.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Ios XeOperating system
Affected:= 16.3.7

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Verify Cisco IOS XE version is installed
    Run the command 'show version' or 'show version | include IOS XE' on the device CLI to obtain the exact IOS XE software version number
    Affected if The displayed version is exactly 16.3.7 (or falls within the affected range if additional ranges are documented elsewhere)
  2. Confirm the Web UI feature is enabled
    Check if the HTTP or HTTPS server is enabled by running 'show ip http server status' or 'show ip http server secure status' in the CLI
    Affected if The output shows HTTP server status as enabled or HTTPS server status as enabled (any port 80 or 443 management interface active)
  3. Check web management access configuration
    Run 'show running-config | include ip http' to view the HTTP/HTTPS server configuration including whether authentication is set to local or AAA
    Affected if The configuration shows 'ip http server' or 'ip http secure-server' is configured and active
  4. Identify active management interfaces
    Use 'show interface' or 'show ip interface brief' to identify which interfaces have IP addresses assigned and are up, as these may provide web UI access
    Affected if Management interfaces (such as Vlan1, GigabitEthernet0/0) have IP addresses and are in 'up' state with web services enabled

A system is affected if it is running Cisco IOS XE version 16.3.7 and has the HTTP or HTTPS web management interface enabled, allowing an authenticated administrator to potentially inject commands through web form inputs.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade Cisco IOS XE to a version that addresses this vulnerability. Restrict administrative access to the Web UI to trusted personnel only until the patch can be applied.

Fix this in Ios Xe Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2019-1862 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data