Exploitation evidence
Known exploited · CISA KEV listed
Added 2022-03-03. Ransomware campaign use: Unknown.
CISA required action: Apply updates per vendor instructions.
CISA due date: 2022-03-24. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
Cisco / IOS
Default status: Not specified
- affected: 12.2(14)ZA
- affected: 12.2(14)ZA3
- affected: 12.2(14)ZA2
- affected: 12.2(14)ZA5
- affected: 12.2(14)ZA4
- affected: 12.2(14)ZA6
- affected: 12.2(14)ZA7
- affected: 12.2(25)SE2
- affected: 12.2(29)SV2
- affected: 12.2(17d)SXB6
- affected: 12.2(17d)SXB11
- affected: 12.2(17d)SXB7
- affected: 12.2(17d)SXB4
- affected: 12.2(17d)SXB2
- affected: 12.2(17d)SXB3
- affected: 12.2(17d)SXB5
- affected: 12.2(17d)SXB10
- affected: 12.2(17d)SXB8
- affected: 12.2(17d)SXB11a
- affected: 12.2(17d)SXB1
- affected: 12.2(17d)SXB9
- affected: 12.2(18)SO1
- affected: 12.2(18)SO3
- affected: 12.2(18)SO2
- affected: 12.2(18)SXF
- affected: 12.2(18)SXF5
- affected: 12.2(18)SXF6
- affected: 12.2(18)SXF15
- affected: 12.2(18)SXF10
- affected: 12.2(18)SXF17b
- affected: 12.2(18)SXF4
- affected: 12.2(18)SXF15a
- affected: 12.2(18)SXF3
- affected: 12.2(18)SXF17
- affected: 12.2(18)SXF12
- affected: 12.2(18)SXF8
- affected: 12.2(18)SXF10a
- affected: 12.2(18)SXF16
- affected: 12.2(18)SXF7
- affected: 12.2(18)SXF17a
- affected: 12.2(18)SXF14
- affected: 12.2(18)SXF12a
- affected: 12.2(18)SXF9
- affected: 12.2(18)SXF13
- affected: 12.2(18)SXF2
- affected: 12.2(18)SXF11
- affected: 12.2(28)ZX
- affected: 12.2(33)STE0
- affected: 15.0(1)XO1
- affected: 15.0(1)XO
- affected: 15.0(2)XO
- affected: 15.0(2)SG11a
- affected: 15.0(1)EX
- affected: 15.0(2)EX2
- affected: 15.0(2)EX8
- affected: 15.0(2)EX10
- affected: 15.0(2)EX11
- affected: 15.0(2)EX13
- affected: 15.0(2)EX12
- affected: 15.1(2)SY9
- affected: 15.1(3)MRA3
- affected: 15.1(3)MRA4
- affected: 15.1(3)SVB1
- affected: 15.1(3)SVB2
- affected: 15.1(3)SVD
- affected: 15.1(3)SVD1
- affected: 15.1(3)SVD2
- affected: 15.1(3)SVF
- affected: 15.1(3)SVF1
- affected: 15.1(3)SVE
- affected: 15.1(3)SVG
- affected: 15.1(3)SVJ2
IntelliShield / Universal Product
Default status: Not specified
- affected: N/A
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp
- http://www.securityfocus.com/bid/99345
- http://www.securitytracker.com/id/1038808
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6740
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.111,
"percentile": 0.95988
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.111,
"percentile": 0.95961
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.111,
"percentile": 0.95957
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.111,
"percentile": 0.95956
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.111,
"percentile": 0.95953
}07 Nov 2026, 06:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
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"providerMetadata": {
"dateUpdated": "2024-08-05T15:41:17.239Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"url": "http://www.securityfocus.com/bid/99345"
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{
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{
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"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp"
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"title": "CVE Program Container"
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"metrics": [
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"id": "CVE-2017-6740",
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"Exploitation": "active"
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"Automatable": "no"
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"Technical Impact": "total"
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"role": "CISA Coordinator",
"timestamp": "2024-11-08T17:35:48.424441Z",
"version": "2.0.3"
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"dateUpdated": "2025-10-21T23:55:37.237Z",
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"value": "CVE-2017-6740 added to CISA KEV"
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"cna": {
"affected": [
{
"product": "IOS",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "12.2(14)ZA"
},
{
"status": "affected",
"version": "12.2(14)ZA3"
},
{
"status": "affected",
"version": "12.2(14)ZA2"
},
{
"status": "affected",
"version": "12.2(14)ZA5"
},
{
"status": "affected",
"version": "12.2(14)ZA4"
},
{
"status": "affected",
"version": "12.2(14)ZA6"
},
{
"status": "affected",
"version": "12.2(14)ZA7"
},
{
"status": "affected",
"version": "12.2(25)SE2"
},
{
"status": "affected",
"version": "12.2(29)SV2"
},
{
"status": "affected",
"version": "12.2(17d)SXB6"
},
{
"status": "affected",
"version": "12.2(17d)SXB11"
},
{
"status": "affected",
"version": "12.2(17d)SXB7"
},
{
"status": "affected",
"version": "12.2(17d)SXB4"
},
{
"status": "affected",
"version": "12.2(17d)SXB2"
},
{
"status": "affected",
"version": "12.2(17d)SXB3"
},
{
"status": "affected",
"version": "12.2(17d)SXB5"
},
{
"status": "affected",
"version": "12.2(17d)SXB10"
},
{
"status": "affected",
"version": "12.2(17d)SXB8"
},
{
"status": "affected",
"version": "12.2(17d)SXB11a"
},
{
"status": "affected",
"version": "12.2(17d)SXB1"
},
{
"status": "affected",
"version": "12.2(17d)SXB9"
},
{
"status": "affected",
"version": "12.2(18)SO1"
},
{
"status": "affected",
"version": "12.2(18)SO3"
},
{
"status": "affected",
"version": "12.2(18)SO2"
},
{
"status": "affected",
"version": "12.2(18)SXF"
},
{
"status": "affected",
"version": "12.2(18)SXF5"
},
{
"status": "affected",
"version": "12.2(18)SXF6"
},
{
"status": "affected",
"version": "12.2(18)SXF15"
},
{
"status": "affected",
"version": "12.2(18)SXF10"
},
{
"status": "affected",
"version": "12.2(18)SXF17b"
},
{
"status": "affected",
"version": "12.2(18)SXF4"
},
{
"status": "affected",
"version": "12.2(18)SXF15a"
},
{
"status": "affected",
"version": "12.2(18)SXF3"
},
{
"status": "affected",
"version": "12.2(18)SXF17"
},
{
"status": "affected",
"version": "12.2(18)SXF12"
},
{
"status": "affected",
"version": "12.2(18)SXF8"
},
{
"status": "affected",
"version": "12.2(18)SXF10a"
},
{
"status": "affected",
"version": "12.2(18)SXF16"
},
{
"status": "affected",
"version": "12.2(18)SXF7"
},
{
"status": "affected",
"version": "12.2(18)SXF17a"
},
{
"status": "affected",
"version": "12.2(18)SXF14"
},
{
"status": "affected",
"version": "12.2(18)SXF12a"
},
{
"status": "affected",
"version": "12.2(18)SXF9"
},
{
"status": "affected",
"version": "12.2(18)SXF13"
},
{
"status": "affected",
"version": "12.2(18)SXF2"
},
{
"status": "affected",
"version": "12.2(18)SXF11"
},
{
"status": "affected",
"version": "12.2(28)ZX"
},
{
"status": "affected",
"version": "12.2(33)STE0"
},
{
"status": "affected",
"version": "15.0(1)XO1"
},
{
"status": "affected",
"version": "15.0(1)XO"
},
{
"status": "affected",
"version": "15.0(2)XO"
},
{
"status": "affected",
"version": "15.0(2)SG11a"
},
{
"status": "affected",
"version": "15.0(1)EX"
},
{
"status": "affected",
"version": "15.0(2)EX2"
},
{
"status": "affected",
"version": "15.0(2)EX8"
},
{
"status": "affected",
"version": "15.0(2)EX10"
},
{
"status": "affected",
"version": "15.0(2)EX11"
},
{
"status": "affected",
"version": "15.0(2)EX13"
},
{
"status": "affected",
"version": "15.0(2)EX12"
},
{
"status": "affected",
"version": "15.1(2)SY9"
},
{
"status": "affected",
"version": "15.1(3)MRA3"
},
{
"status": "affected",
"version": "15.1(3)MRA4"
},
{
"status": "affected",
"version": "15.1(3)SVB1"
},
{
"status": "affected",
"version": "15.1(3)SVB2"
},
{
"status": "affected",
"version": "15.1(3)SVD"
},
{
"status": "affected",
"version": "15.1(3)SVD1"
},
{
"status": "affected",
"version": "15.1(3)SVD2"
},
{
"status": "affected",
"version": "15.1(3)SVF"
},
{
"status": "affected",
"version": "15.1(3)SVF1"
},
{
"status": "affected",
"version": "15.1(3)SVE"
},
{
"status": "affected",
"version": "15.1(3)SVG"
},
{
"status": "affected",
"version": "15.1(3)SVJ2"
}
]
},
{
"product": "Universal Product",
"vendor": "IntelliShield",
"versions": [
{
"status": "affected",
"version": "N/A"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code on an affected system or cause an affected system to reload. An attacker could exploit these vulnerabilities by sending a crafted SNMP packet to an affected system via IPv4 or IPv6. Only traffic directed to an affected system can be used to exploit these vulnerabilities.\r\n\r The vulnerabilities are due to a buffer overflow condition in the SNMP subsystem of the affected software. The vulnerabilities affect all versions of SNMP - Versions 1, 2c, and 3. To exploit these vulnerabilities via SNMP Version 2c or earlier, the attacker must know the SNMP read-only community string for the affected system. To exploit these vulnerabilities via SNMP Version 3, the attacker must have user credentials for the affected system. A successful exploit could allow the attacker to execute arbitrary code and obtain full control of the affected system or cause the affected system to reload.\r\n\r Customers are advised to apply the workaround as contained in the Workarounds section below. Fixed software information is available via the Cisco IOS Software Checker. All devices that have enabled SNMP and have not explicitly excluded the affected MIBs or OIDs should be considered vulnerable.\r\n\r There are workarounds that address these vulnerabilities."
}
],
"exploits": [
{
"lang": "en",
"value": "At the time of initial publication, Cisco was aware of external knowledge of the vulnerabilities described in this advisory and, as a precaution, notified customers about the potential for exploitation.\r\n\r\nOn January 6, 2017, a security researcher published functional exploit code for these vulnerabilities.\r\n\r\nThe Cisco Product Security Incident Response Team (PSIRT) is aware of exploitation of the following vulnerabilities that are described in this advisory:\r\n\r\nCVE-2017-6736\r\nCVE-2017-6737\r\nCVE-2017-6738\r\nCVE-2017-6739\r\nCVE-2017-6740\r\nCVE-2017-6742\r\nCVE-2017-6743\r\nCVE-2017-6744\r\n\r\nThe Cisco PSIRT is aware of exploit code available for CVE-2017-6741.\r\n\r\nAdditional information can be found at Cisco TALOS: DNS Hijacking Abuses Trust In Core Internet Service [\"https://blog.talosintelligence.com/2019/04/seaturtle.html\"]."
}
],
"metrics": [
{
"cvssV3_0": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.0"
},
"format": "cvssV3_0"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-119",
"description": "Improper Restriction of Operations within the Bounds of a Memory Buffer",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-07-31T16:23:28.536Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-20170629-snmp",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp"
}
],
"source": {
"advisory": "cisco-sa-20170629-snmp",
"defects": [
"CSCve66601"
],
"discovery": "UNKNOWN"
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2017-6740",
"datePublished": "2017-07-17T21:00:00.000Z",
"dateReserved": "2017-03-09T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:55:37.237Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.111,
"percentile": 0.95947
}05 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.111,
"percentile": 0.95944
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.111,
"percentile": 0.9594
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.111,
"percentile": 0.95933
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.111,
"percentile": 0.95927
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2017-6740",
"cwes": [
"CWE-119"
],
"dateAdded": "2022-03-03",
"dueDate": "2022-03-24",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2017-6740",
"product": "IOS and IOS XE Software",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE contains a vulnerability that could allow an authenticated, remote attacker to remotely execute code on an affected system or cause an affected system to reload.",
"vendorProject": "Cisco",
"vulnerabilityName": "Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability"
}