Reference page — cumulative record through Thursday, October 8, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2018-0161

CVE-2018-0161MEDIUM

n/a Cisco IOS — Cisco IOS Software

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   L   N  C  N  N  H    6.3   .0412   90.5   YES

AFFECTED
  Product    Versions     Fixed
  Cisco IOS  Cisco IOS –  —

TIMELINE
  Nov 27  Reserved by cisco
  Mar 28  Published (CNA: cisco)
  Mar 3   Added to CISA KEV, remediation due 2022-03-17

CWE-399 · CNA: cisco · CVSS v3.1 · 4 references · KEV due March 17, 2022

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
November 27, 2017	Reserved	Reserved by cisco
March 28, 2018	Published	Published (CNA: cisco)
March 3, 2022	KEV ADDED	Added to CISA KEV, remediation due 2022-03-17

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	Cisco IOS	—	Cisco IOS	—

Weaknesses

CWE-399

References (4)

http://www.securityfocus.com/bid/103573 [vdb-entry, x_refsource_BID]
http://www.securitytracker.com/id/1040589 [vdb-entry, x_refsource_SECTRACK]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-snmp [x_refsource_CONFIRM]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0161 [government-resource]

Authoritative record: CVE-2018-0161 at cve.org

Weaknesses: CWE-399

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2018-0161 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Thursday, October 8, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.