CVE-2017-6744: Cisco IOS Software SNMP Remote Code Execution Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS 1 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. An attacker could exploit these vulnerabilities by sending a crafted SNMP packet to an affected system via IPv4 or IPv6.
CSIRTS triage
- What
- The SNMP subsystem of Cisco IOS contains a vulnerability that could allow an authenticated, remote attacker to remotely execute code.
- Who is affected
- Authenticated users of Cisco IOS Software are affected.
- Urgency
- Remediation is urgent due to the critical nature of the vulnerability and its exploitation status.
- Action
- Apply the latest security patches provided by Cisco.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2017-6744
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2017-6744Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 94% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2017-6744 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Cisco IOS Software
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- mediumCisco IOS XE Software Denial of Service Vulnerabilitycisco-psirt · 2026-04-02
- criticalexploitedCVE-2025-20352: Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerabilitycisa-kev · 2025-09-29
- criticalexploitedCVE-2017-6742: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycisa-kev · 2023-04-19
- criticalexploitedCVE-2017-6743: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycisa-kev · 2022-03-03
- criticalexploitedCVE-2018-0174: Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerabilitycisa-kev · 2022-03-03
- criticalexploitedCVE-2018-0180: Cisco IOS Software Denial-of-Service Vulnerabilitycisa-kev · 2022-03-03
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