What is the CVSS score of CVE-2021-47894?

CVE-2021-47894 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of SNMP are affected by CVE-2021-47894?

A denial of service vulnerability in Managed Switch Port Mapping Tool 2.85.2 allows attackers to crash the application, potentially disrupting network management operations.

Is there a public PoC exploit available for CVE-2021-47894?

Yes, a public proof-of-concept exploit is available for CVE-2021-47894. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2021-47894?

Within 24 hours: Identify all instances of Managed Switch Port Mapping Tool 2.85.2 in production and document their criticality and network exposure. Within 7 days: Implement network segmentation to restrict access to the application from untrusted sources, disable the application if not mission-critical, or deploy compensating controls such as request size filtering on adjacent network devices. Within 30 days: Contact the vendor for patch availability status, evaluate alternative switch management solutions, and establish a timeline for migration or upgrade once patches are released.

SNMP CVE-2021-47894

HIGH

Allocation of Resources Without Limits or Throttling (CWE-770)

2026-01-23 disclosure@vulncheck.com

SNMP Denial Of Service

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 26, 2026 - 15:03 vuln.today

Public exploit code

CVE Published

Jan 23, 2026 - 17:15 nvd

HIGH 7.5

DescriptionCVE.org

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.

AnalysisAI

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. [CVSS 7.5 HIGH]

Technical ContextAI

This vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) 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.