What is CVE-2021-47894?

CVE-2021-47894 is a high-severity vulnerability in Northwest Performance Software, Inc. Managed Switch Port Mapping Tool, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-01-23.

How severe is CVE-2021-47894?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Northwest Performance Software, Inc. Managed Switch Port Mapping Tool

CVE-2021-47894

Managed Switch Port Mapping Tool 2.85.2 contains a denial of service vulnerability that allows attackers to crash the application by creating an oversized buffer. Attackers can generate a 10,000-character buffer and paste it into the IP Address and SNMP Community Name fields to trigger the application crash.

Published 2026-01-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (19.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Northwest Performance Software, Inc. Managed Switch Port Mapping Tool — versions 2.85.2

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

ExploitDB-49566 (exploit)
Vendor Homepage (product)
Software Download Page (product)
VulnCheck Advisory: Managed Switch Port Mapping Tool 2.85.2 - Denial of Service (third-party-advisory)

Frequently asked questions

What is CVE-2021-47894?: CVE-2021-47894 is a high-severity vulnerability in Northwest Performance Software, Inc. Managed Switch Port Mapping Tool, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-01-23.
How severe is CVE-2021-47894?: High severity. CVSS v3 base score is 7.5 out of 10.