CVE-2017-12232

MEDIUMNVD 6.59.0▲
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 6.5 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
6.5
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 2%CVSS: 6.5Exploit: NoneExposed: 0

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

A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS 15.0 through 15.6 could allow an unauthenticated, adjacent attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to a misclassification of Ethernet frames. An attacker could exploit this vulnerability by sending a crafted Ethernet frame to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCvc03809.

CVSS v3
6.5
EG Score
9.0(high)
EPSS
80.1%
KEV
⚠ Exploited

Published

September 29, 2017

Last Modified

April 22, 2026

Advisory Details (4)

Auto-updated May 20, 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-2017-12232
generic🔴 Active Exploitation

Cisco IOS Software for Cisco Integrated Services Routers Generation 2 Denial of Service Vulnerability

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-rbip-dos
generic
http://www.securitytracker.com/id/1039452
generic
http://www.securityfocus.com/bid/101044

Data Freshness Timeline

(refreshed 97× in last 7d / 415× 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 563 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2017-12232?
CVE-2017-12232 is a medium vulnerability published on September 29, 2017. A vulnerability in the implementation of a protocol in Cisco Integrated Services Routers Generation 2 (ISR G2) Routers running Cisco IOS 15.0 through 15.6 could allow an unauthenticated, adjacent attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The…
When was CVE-2017-12232 disclosed?
CVE-2017-12232 was first published in the National Vulnerability Database on September 29, 2017, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-12232 actively exploited?
Yes. CISA added CVE-2017-12232 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-2017-12232?
CVE-2017-12232 has a CVSS v3 base score of 6.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2017-12232?
CVE-2017-12232 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-2017-12232?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-12232, 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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