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
90.9%
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 61× in last 7d / 239× 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 435 total refreshes for this CVE.

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

Related CVEs(same CWE)

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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2018-0161

Explore →

Is Your Infrastructure Affected by CVE-2018-0161?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs