CVE-2021-47894Public exploit

Application crash via oversized configuration fields

Published Jan 23, 2026 · Updated Jan 23, 2026

Denial of service in Managed Switch Port Mapping Tool 2.85.2 allows local users to crash the application through oversized field input. The Settings dialog accepts a 10,000-character string in the IP Address and SNMP v1/v2c Read Community Name fields without enforcing a safe length. A local user must open the Windows GUI, paste the string, and confirm the dialog; the demonstrated consequence is an application crash.

CVSS severity6.7
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Managed Switch Port Mapping Tool 2.85.2 allows local users to crash the application through oversized field input. The Settings dialog accepts a 10,000-character string in the IP Address and SNMP v1/v2c Read Community Name fields without enforcing a safe length. A local user must open the Windows GUI, paste the string, and confirm the dialog; the demonstrated consequence is an application crash.

The record

CVE
CVE-2021-47894
Published
Jan 23, 2026
Updated
Jan 23, 2026
Vendor
Northwest Performance Software, Inc.
Product
Managed Switch Port Mapping Tool
Classifications
CWE-770, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.85.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Northwest Performance Software, Inc. · Managed Switch Port Mapping Toolversion=2.85.2

Published CVSS scores

6.7VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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