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.
CVE-2018-0161
Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 6.3 retained for reference. Confidence: HIGH.
- Actively exploited in the wild (CISA-KEV)
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.3
- EG Score
- 9.0(high)
- EPSS
- 90.8%
- KEV
- ⚠ Exploited
Published
March 28, 2018
Last Modified
January 14, 2026
Advisory Details (4)
Auto-updated Jun 13, 2026Known Exploited Vulnerabilities Catalog | CISA
Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0161Cisco IOS Software Simple Network Management Protocol GET MIB Object ID Denial of Service Vulnerability
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-snmpWeakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 94× in last 7d / 408× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 582 total refreshes for this CVE.
- 2026-07-11 18:34 UTCEG score recompute
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- 2026-07-10 18:17 UTCGHSA enrichment
- 2026-07-10 17:52 UTCCISA KEV update
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- 2026-07-10 14:14 UTCGHSA enrichment
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- 2026-07-09 22:04 UTCGHSA enrichment
- 2026-07-09 19:06 UTCEPSS rescore
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- 2026-07-08 21:48 UTCGHSA enrichment
- 2026-07-08 17:46 UTCEG score recompute
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- 2026-07-08 15:11 UTCEPSS rescore
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- 2026-07-08 13:44 UTCGHSA enrichment
- 2026-07-08 09:42 UTCEG score recompute
- 2026-07-08 09:42 UTCGHSA enrichment
- 2026-07-08 05:41 UTCEG score recompute
- 2026-07-08 05:40 UTCGHSA enrichment
- 2026-07-08 01:37 UTCEG score recompute
- 2026-07-08 01:37 UTCGHSA enrichment
- 2026-07-07 21:35 UTCEG score recompute
- 2026-07-07 21:35 UTCGHSA enrichment
- 2026-07-07 19:01 UTCCISA KEV update
- 2026-07-07 17:34 UTCEG score recompute
- 2026-07-07 17:33 UTCGHSA enrichment
- 2026-07-07 17:16 UTCCISA KEV update
- 2026-07-07 13:42 UTCEPSS rescore
- 2026-07-07 13:28 UTCEG score recompute
- 2026-07-07 13:28 UTCGHSA enrichment
- 2026-07-07 09:25 UTCEG score recompute
- 2026-07-07 09:25 UTCGHSA enrichment
- 2026-07-07 05:22 UTCEG score recompute
- 2026-07-07 05:22 UTCGHSA enrichment
- 2026-07-07 01:20 UTCEG score recompute
- 2026-07-07 01:20 UTCGHSA enrichment
- 2026-07-06 21:18 UTCEG score recompute
- 2026-07-06 21:18 UTCGHSA enrichment
- 2026-07-06 17:15 UTCEG score recompute
- 2026-07-06 17:14 UTCGHSA enrichment
- 2026-07-06 16:24 UTCEPSS rescore
- 2026-07-06 16:24 UTCEPSS rescore
- 2026-07-06 13:11 UTCEG score recompute
- 2026-07-06 13:10 UTCGHSA enrichment
- 2026-07-06 09:08 UTCEG score recompute
- 2026-07-06 09:08 UTCGHSA enrichment
- 2026-07-06 05:05 UTCEG score recompute
- 2026-07-06 05:05 UTCGHSA enrichment
- 2026-07-06 02:20 UTCEPSS rescore
- 2026-07-06 02:20 UTCEPSS rescore
- 2026-07-06 01:03 UTCEG score recompute
- 2026-07-06 01:03 UTCGHSA enrichment
- 2026-07-05 21:00 UTCEG score recompute
- 2026-07-05 21:00 UTCGHSA enrichment
- 2026-07-05 16:58 UTCEG score recompute
- 2026-07-05 16:58 UTCGHSA enrichment
- 2026-07-05 12:56 UTCEG score recompute
- 2026-07-05 12:56 UTCGHSA enrichment
- 2026-07-05 08:54 UTCEG score recompute
- 2026-07-05 08:54 UTCGHSA enrichment
- 2026-07-05 04:52 UTCEG score recompute
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- 2026-07-05 02:27 UTCEPSS rescore
- 2026-07-05 00:48 UTCEG score recompute
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- 2026-07-04 20:46 UTCEG score recompute
- 2026-07-04 20:46 UTCGHSA enrichment
- 2026-07-04 16:44 UTCEG score recompute
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- 2026-07-04 12:42 UTCEG score recompute
- 2026-07-04 12:42 UTCGHSA enrichment
Frequently asked(6)
What is CVE-2018-0161?
When was CVE-2018-0161 disclosed?
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