CVE-2017-6742

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-04-19), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 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: 21%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

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

A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device.  The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system. Only traffic directed to the affected system can be used to exploit this vulnerability.

CVSS v3
8.8
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
21%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

July 17, 2017

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated May 2, 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-2017-6742
generic

SNMP Remote Code Execution Vulnerabilities in Cisco IOS and IOS XE Software

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp
generic
http://www.securityfocus.com/bid/99345
generic

SNMP Remote Code Execution Vulnerabilities in Cisco IOS and IOS XE Software

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 59× in last 7d / 249× 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 974 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2017-6742?
CVE-2017-6742 is a critical vulnerability published on July 17, 2017. A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device.  The vulnerability is due to a…
When was CVE-2017-6742 disclosed?
CVE-2017-6742 was first published in the National Vulnerability Database on July 17, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-6742 actively exploited?
Yes. CISA added CVE-2017-6742 to the Known Exploited Vulnerabilities catalog on April 19, 2023, affecting Cisco IOS and IOS XE Software. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2017-6742?
CVE-2017-6742 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2017-6742?
CVE-2017-6742 affects Cisco IOS and 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-2017-6742?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-6742, 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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