CVE-2016-6415

HIGHNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-05-19), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 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
7.5
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 87%CVSS: 7.5Exploit: NoneExposed: 0

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

The server IKEv1 implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.6, IOS XE through 3.18S, IOS XR 4.3.x and 5.0.x through 5.2.x, and PIX before 7.0 allows remote attackers to obtain sensitive information from device memory via a Security Association (SA) negotiation request, aka Bug IDs CSCvb29204 and CSCvb36055 or BENIGNCERTAIN.

CVSS v3
7.5
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
99.7%
KEV
⚠ Exploited

Published

September 19, 2016

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-2016-6415
generic
http://www.securitytracker.com/id/1036841
generic
http://www.securityfocus.com/bid/93003
generic

IKEv1 Information Disclosure Vulnerability in Multiple Cisco Products

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160916-ikev1

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 42× in last 7d / 214× 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 434 total refreshes for this CVE.

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

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoC3ndG4me/CVE-2016-6415-BenignCertain-Monitor
    First seen Nov 4, 2020

    Re-implementation of VirtueSecurity's benigncertain-monitor

    Open source ↗
  • Exploit-DBEDB-43383
    First seen Mar 17, 2017

    Cisco IOS 12.2 < 12.4 / 15.0 < 15.6 - Security Association Negotiation Request Device Memory

    Open source ↗
  • Metasploitauxiliary/scanner/ike/cisco_ike_benigncertain✓ verified
    First seen Sep 29, 2016

    Cisco IKE Information Disclosure

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2016-6415?
CVE-2016-6415 is a high vulnerability published on September 19, 2016. The server IKEv1 implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.6, IOS XE through 3.18S, IOS XR 4.3.x and 5.0.x through 5.2.x, and PIX before 7.0 allows remote attackers to obtain sensitive information from device memory via a Security Association (SA) negotiation request, aka…
When was CVE-2016-6415 disclosed?
CVE-2016-6415 was first published in the National Vulnerability Database on September 19, 2016, 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-2016-6415 actively exploited?
Yes. CISA added CVE-2016-6415 to the Known Exploited Vulnerabilities catalog on May 19, 2023, affecting Cisco IOS, IOS XR, and IOS XE. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2016-6415?
CVE-2016-6415 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2016-6415?
CVE-2016-6415 affects Cisco IOS, IOS XR, and IOS XE. 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-2016-6415?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-6415, 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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