CVE-2018-0161

CRITICALNVD 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 4%CVSS: 6.3Exploit: cisa kev · ssvc activeExposed: 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)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
4%
EPSS %ILE
90%
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 56× in last 7d / 243× 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 897 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2018-0161?
CVE-2018-0161 is a critical 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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