CVE DATABASE / CVE-2018-0161

CVE-2018-0161

Cisco IOS Software Resource Management Errors Vulnerability

CVSS 6.3 · MEDIUM ⚠ CISA KEV — ACTIVELY EXPLOITED

On the CISA KEV catalog

Confirmed exploited in the wild. Added 2022-03-03. Federal remediation due 2022-03-17.
Required action: Apply updates per vendor instructions.

Summary

A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated, remote attacker to cause a denial of service (DoS) condition, aka a GET MIB Object ID Denial of Service Vulnerability. The vulnerability is due to a condition that could occur when the affected software processes an SNMP read request that contains a request for the ciscoFlashMIB object ID (OID). An attacker could trigger this vulnerability by issuing an SNMP GET request for the ciscoFlashMIB OID on an affected device. A successful exploit could cause the affected device to restart due to a SYS-3-CPUHOG. This vulnerability affects the following Cisco devices if they are running a vulnerable release of Cisco IOS Software and are configured to use SNMP Version 2 (SNMPv2) or SNMP Version 3 (SNMPv3): Cisco Catalyst 2960-L Series Switches, Cisco Catalyst Digital Building Series Switches 8P, Cisco Catalyst Digital Building Series Switches 8U. Cisco Bug IDs: CSCvd89541.

CVSS 3.1 breakdown

Base score	6.3 (MEDIUM)
Vector	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack vector	NETWORK
Attack complexity	HIGH
Privileges required	LOW
User interaction	NONE
Scope	CHANGED
Confidentiality	NONE
Integrity	NONE
Availability	HIGH

Weakness type (CWE)

CWE-399

Affected products

Cisco iosCisco catalyst 2960l-16ps-llCisco catalyst 2960l-16ts-llCisco catalyst 2960l-24pq-llCisco catalyst 2960l-24ps-llCisco catalyst 2960l-24tq-llCisco catalyst 2960l-24ts-llCisco catalyst 2960l-48pq-llCisco catalyst 2960l-48ps-llCisco catalyst 2960l-48tq-llCisco catalyst 2960l-48ts-llCisco catalyst 2960l-8ps-llCisco catalyst 2960l-8ts-llCisco catalyst digital building series switches-8pCisco catalyst digital building series switches-8u

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References

Data: NIST NVD + CISA KEV. NVD last modified 2026-01-14. Always verify against the vendor advisory before acting.