CVE-2017-6737

HIGHNVD 8.89.0▲
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 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
8.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 43%CVSS: 8.8Exploit: NoneExposed: 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)
EPSS
98.5%
KEV
⚠ Exploited

Published

July 17, 2017

Last Modified

April 22, 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-2017-6737
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 88× in last 7d / 398× 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 537 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2017-6737?
CVE-2017-6737 is a high 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-2017-6737 disclosed?
CVE-2017-6737 was first published in the National Vulnerability Database on July 17, 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-2017-6737 actively exploited?
Yes. CISA added CVE-2017-6737 to the Known Exploited Vulnerabilities catalog on March 3, 2022, 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-2017-6737?
CVE-2017-6737 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-2017-6737?
CVE-2017-6737 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-2017-6737?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-6737, 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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