Exploited CVEs / Cisco / CVE-2017-6742
CVE-2017-6742
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2023-05-10 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: Cisco Security Advisories (PSIRT), linked below.
Actively exploited Cisco IOS and IOS XE Software vulnerability, High severity, CVSS 8.8. Added to the CISA KEV catalog 2023-04-19.
Risk summary
Updated July 27, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2017-6742
This flaw sits in the SNMP subsystem of Cisco IOS and IOS XE, so any router or switch running SNMP with a valid community string or credential is exposed to remote code execution or a forced reload. CISA confirmed active exploitation and added it to the KEV catalog in April 2023, and with a 21 percent EPSS score the risk of encountering exploitation is meaningful. Because SNMP is widely enabled on network infrastructure for monitoring, this can hit the devices that hold your network together.
Do this: Apply the fixed Cisco IOS or IOS XE release, and until then restrict SNMP access to trusted management hosts and disable the vulnerable SNMP object identifiers per Cisco guidance.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2017-6742
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2017-6742
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2023-05-10 (past due).
Apply updates per vendor instructions.
Official fix for CVE-2017-6742
The authoritative fix and affected-version list are published by the vendor. Find the IOS and IOS XE Software advisory on Cisco Security Advisories (PSIRT).
Common questions about CVE-2017-6742
Is CVE-2017-6742 actively exploited?
Yes. CVE-2017-6742 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2023-04-19, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 21%.
What is the CISA deadline and required action for CVE-2017-6742?
CISA set the federal (BOD 22-01) remediation due date at 2023-05-10, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.
What fixes CVE-2017-6742?
The authoritative fix is in the vendor advisory: see Cisco Security Advisories (PSIRT) for the patched IOS and IOS XE Software versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2017-6742?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2017-6742's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
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Authoritative references
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