CVE-2021-47894 Managed Switch Port Mapping Tool 2.85.2 - Denial of Service
Attackers can crash the Managed Switch Port Mapping Tool by inputting oversized buffers into specific fields, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-47894?
CVE-2021-47894 is a medium-severity denial of service vulnerability in Northwest Performance Software, Inc. Managed Switch Port Mapping Tool, published on 23 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-770
Which versions are affected by CVE-2021-47894?
How do I fix CVE-2021-47894?
No fix has been published for CVE-2021-47894 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-47894 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47894 exists.
Sources
Also known as GHSA-52gx-mj6q-xrjv.