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CVE Record

CVE-2021-37444: NCH IVM Attendant v5.12 and earlier suffers from a directory traversal weakness upon uploading plugins in a...

NCH IVM Attendant v5.12 and earlier suffers from a directory traversal weakness upon uploading plugins in a ZIP archive. This can lead to code execution if a ZIP element's pathname is set to a Windows startup folder, a file for the inbuilt Out-Going Message function, or a file for the the inbuilt Autodial function.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

NCH IVM Attendant v5.12 and earlier has a plugin ZIP handling flaw that may let files be placed outside the intended directory. If abused, that file placement can lead to code execution through startup or built-in message/autodial paths.

Executive priority

Prioritize if the product is present, especially on systems handling telephony workflows. Code execution is possible, but urgency depends on confirmed deployment and who can install plugins.

Technical view

The CVE describes directory traversal during plugin upload from ZIP archives. A crafted ZIP entry pathname may write into sensitive Windows or application-specific locations, creating a path from arbitrary file placement to code execution. The bundle does not provide CVSS, CWE, patch status, or vendor remediation detail.

Likely exposure

Exposure appears limited to environments running NCH IVM Attendant v5.12 or earlier with plugin upload or installation capability. Public internet exposure is not established in the provided sources.

Exploitation context

The CVE references a public proof-of-concept write-up, but the bundle does not show CISA KEV listing or other evidence of active exploitation.

Researcher notes

Evidence is sparse: no CVSS, CWE, affected CPEs, fixed version, or vendor advisory is included. Treat the GitHub reference as public exploit-context evidence without assuming real-world exploitation.

Mitigation direction

  • Identify any NCH IVM Attendant installations and versions.
  • Check NCH guidance for fixed versions or supported upgrade paths.
  • Restrict plugin upload or installation to trusted administrators only.
  • Review host hardening around Windows startup and application data paths.
  • Remove unsupported or unused IVM Attendant deployments.

Validation and detection

  • Inventory endpoints and servers for NCH IVM Attendant.
  • Confirm whether installed versions are v5.12 or earlier.
  • Review whether plugin upload or installation is enabled.
  • Inspect recent plugin installation activity for unexpected files.
  • Check startup and IVM message/autodial paths for unexpected additions.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
description · low confidence lookup

File access behavior lookup

The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-37444 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.