What it is
CVE-2017-6742 is a vulnerability affecting Cisco, IntelliShield Cisco IOS XE Software, Universal Product. A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2017-6742
Cisco IOS XE Software
Cisco / Cisco IOS XE Software · 3.7.0S
- Severity
- CVSS 8.8 · High
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 21.4%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.
Who is affected?
Cisco, IntelliShield / Cisco IOS XE Software 3.7.0s.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Cisco IOS XE Software
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.
Vendor
Product
Affected
Status
Cisco
Cisco IOS XE Software
3.15.0S
Affected
Cisco
Cisco IOS XE Software
3.15.1S
Affected
Cisco
Cisco IOS XE Software
3.15.2S
Affected
Cisco
Cisco IOS XE Software
3.15.1cS
Affected
Cisco
Cisco IOS XE Software
3.15.3S
Affected
Cisco
Cisco IOS XE Software
3.15.4S
Affected
Cisco
Cisco IOS XE Software
3.7.4E
Affected
Cisco
Cisco IOS XE Software
3.7.5E
Affected
Cisco
Cisco IOS XE Software
3.16.0S
Affected
Cisco
Cisco IOS XE Software
3.16.1S
Affected
Cisco
Cisco IOS XE Software
3.16.1aS
Affected
Cisco
Cisco IOS XE Software
3.16.2S
Affected
Cisco
Cisco IOS XE Software
3.16.0cS
Affected
Cisco
Cisco IOS XE Software
3.16.3S
Affected
Cisco
Cisco IOS XE Software
3.16.2bS
Affected
Cisco
Cisco IOS XE Software
3.16.4aS
Affected
Cisco
Cisco IOS XE Software
3.16.4bS
Affected
Cisco
Cisco IOS XE Software
3.16.5S
Affected
Cisco
Cisco IOS XE Software
3.16.4dS
Affected
Cisco
Cisco IOS XE Software
3.17.0S
Affected
Cisco
Cisco IOS XE Software
3.17.1S
Affected
Cisco
Cisco IOS XE Software
3.17.2S
Affected
Cisco
Cisco IOS XE Software
3.17.1aS
Affected
Cisco
Cisco IOS XE Software
3.17.3S
Affected
Cisco
Cisco IOS XE Software
16.2.1
Affected
- Published
- 17 Jul 2017
- Exploitation Reported
- 19 Apr 2023
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
Tags
edge
nessus_scanner
ios
cisa
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2017-6742
- cisco-sa-20170629-snmp sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CISA
Independent exploitation attestation added to the KEV Intelligence record.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2023-04-19 00:00 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
Nessus template detected 02 Jun 2025.
View Nessus template (opens in new tab)Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →Scanner Artifacts
Scanner and exploit-framework references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nessus | https://www.tenable.com/plugins/nessus/101269 | 02 Jun 2025 |
Risk and context
Severity, weaknesses, and research context
CVSS v3.0
8.8
High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
21.4%
Timeline
From disclosure to observed exploitation
-
Nessus plugin available
Scanner coverage available
-
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2017-6742
Free JSON includes basic KEV fields{
"cve_id": "CVE-2017-6742",
"confidence": "Confirmed",
"cvss_score": 8.8,
"cvss_estimated": false,
"epss_score": 0.21424,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.