CVE-2018-0161

MEDIUMNVD 6.39.0▲
EchelonGraph scoreHIGH confidence

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.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
6.3
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 5%CVSS: 6.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 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, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known 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-2018-0161
generic🔴 Active Exploitation

Cisco 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-snmp
generic
http://www.securitytracker.com/id/1040589
generic
http://www.securityfocus.com/bid/103573

Weakness 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.

  1. 2026-07-11 18:34 UTCEG score recompute
  2. 2026-07-11 18:34 UTCGHSA enrichment
  3. 2026-07-11 14:32 UTCEG score recompute
  4. 2026-07-11 14:32 UTCGHSA enrichment
  5. 2026-07-11 10:28 UTCEG score recompute
  6. 2026-07-11 10:28 UTCGHSA enrichment
  7. 2026-07-11 08:24 UTCEPSS rescore
  8. 2026-07-11 06:26 UTCEG score recompute
  9. 2026-07-11 06:26 UTCGHSA enrichment
  10. 2026-07-11 02:24 UTCEG score recompute
  11. 2026-07-11 02:24 UTCGHSA enrichment
  12. 2026-07-10 22:22 UTCEG score recompute
  13. 2026-07-10 22:22 UTCGHSA enrichment
  14. 2026-07-10 18:17 UTCEG score recompute
  15. 2026-07-10 18:17 UTCGHSA enrichment
  16. 2026-07-10 17:52 UTCCISA KEV update
  17. 2026-07-10 14:15 UTCEG score recompute
  18. 2026-07-10 14:14 UTCGHSA enrichment
  19. 2026-07-10 10:12 UTCEG score recompute
  20. 2026-07-10 10:12 UTCGHSA enrichment
  21. 2026-07-10 06:10 UTCEG score recompute
  22. 2026-07-10 06:10 UTCGHSA enrichment
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  24. 2026-07-10 02:08 UTCGHSA enrichment
  25. 2026-07-09 22:05 UTCEG score recompute
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  1. 2026-07-09 22:04 UTCGHSA enrichment
  2. 2026-07-09 19:06 UTCEPSS rescore
  3. 2026-07-09 18:02 UTCEG score recompute
  4. 2026-07-09 18:02 UTCGHSA enrichment
  5. 2026-07-09 13:58 UTCEG score recompute
  6. 2026-07-09 13:58 UTCGHSA enrichment
  7. 2026-07-09 09:55 UTCEG score recompute
  8. 2026-07-09 09:55 UTCGHSA enrichment
  9. 2026-07-09 05:53 UTCEG score recompute
  10. 2026-07-09 05:53 UTCGHSA enrichment
  11. 2026-07-09 01:50 UTCEG score recompute
  12. 2026-07-09 01:50 UTCGHSA enrichment
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  14. 2026-07-08 21:48 UTCGHSA enrichment
  15. 2026-07-08 17:46 UTCEG score recompute
  16. 2026-07-08 17:46 UTCGHSA enrichment
  17. 2026-07-08 15:11 UTCEPSS rescore
  18. 2026-07-08 13:44 UTCEG score recompute
  19. 2026-07-08 13:44 UTCGHSA enrichment
  20. 2026-07-08 09:42 UTCEG score recompute
  21. 2026-07-08 09:42 UTCGHSA enrichment
  22. 2026-07-08 05:41 UTCEG score recompute
  23. 2026-07-08 05:40 UTCGHSA enrichment
  24. 2026-07-08 01:37 UTCEG score recompute
  25. 2026-07-08 01:37 UTCGHSA enrichment
  26. 2026-07-07 21:35 UTCEG score recompute
  27. 2026-07-07 21:35 UTCGHSA enrichment
  28. 2026-07-07 19:01 UTCCISA KEV update
  29. 2026-07-07 17:34 UTCEG score recompute
  30. 2026-07-07 17:33 UTCGHSA enrichment
  31. 2026-07-07 17:16 UTCCISA KEV update
  32. 2026-07-07 13:42 UTCEPSS rescore
  33. 2026-07-07 13:28 UTCEG score recompute
  34. 2026-07-07 13:28 UTCGHSA enrichment
  35. 2026-07-07 09:25 UTCEG score recompute
  36. 2026-07-07 09:25 UTCGHSA enrichment
  37. 2026-07-07 05:22 UTCEG score recompute
  38. 2026-07-07 05:22 UTCGHSA enrichment
  39. 2026-07-07 01:20 UTCEG score recompute
  40. 2026-07-07 01:20 UTCGHSA enrichment
  41. 2026-07-06 21:18 UTCEG score recompute
  42. 2026-07-06 21:18 UTCGHSA enrichment
  43. 2026-07-06 17:15 UTCEG score recompute
  44. 2026-07-06 17:14 UTCGHSA enrichment
  45. 2026-07-06 16:24 UTCEPSS rescore
  46. 2026-07-06 16:24 UTCEPSS rescore
  47. 2026-07-06 13:11 UTCEG score recompute
  48. 2026-07-06 13:10 UTCGHSA enrichment
  49. 2026-07-06 09:08 UTCEG score recompute
  50. 2026-07-06 09:08 UTCGHSA enrichment
  51. 2026-07-06 05:05 UTCEG score recompute
  52. 2026-07-06 05:05 UTCGHSA enrichment
  53. 2026-07-06 02:20 UTCEPSS rescore
  54. 2026-07-06 02:20 UTCEPSS rescore
  55. 2026-07-06 01:03 UTCEG score recompute
  56. 2026-07-06 01:03 UTCGHSA enrichment
  57. 2026-07-05 21:00 UTCEG score recompute
  58. 2026-07-05 21:00 UTCGHSA enrichment
  59. 2026-07-05 16:58 UTCEG score recompute
  60. 2026-07-05 16:58 UTCGHSA enrichment
  61. 2026-07-05 12:56 UTCEG score recompute
  62. 2026-07-05 12:56 UTCGHSA enrichment
  63. 2026-07-05 08:54 UTCEG score recompute
  64. 2026-07-05 08:54 UTCGHSA enrichment
  65. 2026-07-05 04:52 UTCEG score recompute
  66. 2026-07-05 04:52 UTCGHSA enrichment
  67. 2026-07-05 02:27 UTCEPSS rescore
  68. 2026-07-05 00:48 UTCEG score recompute
  69. 2026-07-05 00:48 UTCGHSA enrichment
  70. 2026-07-04 20:46 UTCEG score recompute
  71. 2026-07-04 20:46 UTCGHSA enrichment
  72. 2026-07-04 16:44 UTCEG score recompute
  73. 2026-07-04 16:44 UTCGHSA enrichment
  74. 2026-07-04 12:42 UTCEG score recompute
  75. 2026-07-04 12:42 UTCGHSA enrichment

Frequently asked(6)

What is CVE-2018-0161?
CVE-2018-0161 is a medium vulnerability published on March 28, 2018. 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.…
When was CVE-2018-0161 disclosed?
CVE-2018-0161 was first published in the National Vulnerability Database on March 28, 2018, with the most recent update on January 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-0161 actively exploited?
Yes. CISA added CVE-2018-0161 to the Known Exploited Vulnerabilities catalog on March 3, 2022, affecting Cisco IOS Software. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2018-0161?
CVE-2018-0161 has a CVSS v3 base score of 6.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2018-0161?
CVE-2018-0161 affects Cisco IOS Software. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2018-0161?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-0161, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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