CVE intelligence and bounded remediation

CVE-2020-7820 — Nexaweb Nexacro 14 security vulnerability

Critical CVSS 9.8

Nexacro14/17 ExtCommonApiV13 Library under 2019.9.6 version contain a vulnerability that could allow remote attacker to execute arbitrary code by setting the arguments to the vulnerable API. This can be leveraged for code execution by rebooting the victim’s PC

Severity
Critical
CVSS
9.8 (3.1)
Published
2020-07-02
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-20

Affected products

  • nexaweb / nexacro_14
  • nexaweb / nexacro_17

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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