CVE-2017-12319

CRITICALNVD 5.99.0▲
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 5.9 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: 5%CVSS: 5.9Exploit: 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 Border Gateway Protocol (BGP) over an Ethernet Virtual Private Network (EVPN) for Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload, resulting in a denial of service (DoS) condition, or potentially corrupt the BGP routing table, which could result in network instability. The vulnerability exists due to changes in the implementation of the BGP MPLS-Based Ethernet VPN RFC (RFC 7432) draft between IOS XE software releases. When the BGP Inclusive Multicast Ethernet Tag Route or BGP EVPN MAC/IP Advertisement Route update packet is received, it could be possible that the IP address length field is miscalculated. An attacker could exploit this vulnerability by sending a crafted BGP packet to an affected device after the BGP session was established. An exploit could allow the attacker to cause the affected device to reload or corrupt the BGP routing table; either outcome would result in a DoS. The vulnerability may be triggered when the router receives a crafted BGP message from a peer on an existing BGP session. This vulnerability affects all releases of Cisco IOS XE Software prior to software release 16.3 that support BGP EVPN configurations. If the device is not configured for EVPN, it is not vulnerable. Cisco Bug IDs: CSCui67191, CSCvg52875.

CVSS v3
5.9
EG Score
9.0(high)
EG Risk
96(Attend)
EG Risk 96/100SSVC: 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%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
5%
EPSS %ILE
92%
KEV
⚠ Exploited

Published

March 27, 2018

Last Modified

January 13, 2026

Advisory Details (3)

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-2017-12319
generic🔴 Active Exploitation

Cisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial of Service Vulnerability

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171103-bgp
generic
http://www.securityfocus.com/bid/101676

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 52× in last 7d / 227× 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 747 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2017-12319?
CVE-2017-12319 is a critical vulnerability published on March 27, 2018. A vulnerability in the Border Gateway Protocol (BGP) over an Ethernet Virtual Private Network (EVPN) for Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload, resulting in a denial of service (DoS) condition, or potentially corrupt the BGP routing…
When was CVE-2017-12319 disclosed?
CVE-2017-12319 was first published in the National Vulnerability Database on March 27, 2018, with the most recent update on January 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-12319 actively exploited?
Yes. CISA added CVE-2017-12319 to the Known Exploited Vulnerabilities catalog on March 3, 2022, affecting Cisco IOS XE Software. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2017-12319?
CVE-2017-12319 has a CVSS v3 base score of 5.9 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2017-12319?
CVE-2017-12319 affects Cisco IOS XE 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-2017-12319?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-12319, 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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