CVE intelligence and bounded remediation

CVE-2022-20693 — Cisco Ios Xe security vulnerability

High CVSS 9

A vulnerability in the web UI feature of Cisco IOS XE Software could allow an authenticated, remote attacker to perform an injection attack against an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted input to the web UI API. A successful exploit could allow the attacker to inject commands to the underlying operating system with root privileges.

Severity
High
CVSS
9 (2.0)
Published
2022-04-15
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-74, CWE-78

Affected products

  • cisco / ios_xe / 3.15.1xbs
  • cisco / ios_xe / 3.15.2xbs
  • cisco / ios_xe / 16.12.1
  • cisco / ios_xe / 16.12.1a
  • cisco / ios_xe / 16.12.1c
  • cisco / ios_xe / 16.12.1s

Showing 6 representative product identities from 63 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Command, code, expression, and template injection

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Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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