CVE-2026-20177
An attacker can exploit multiple vulnerabilities in Cisco Industrial Ethernet Switches to perform denial of service attacks or cross-site scripting attacks.
CSIRTS triage
- What
- Multiple vulnerabilities enable denial-of-service attacks and cross-site scripting attacks on Industrial Ethernet switches.
- Who is affected
- Organizations operating Cisco Industrial Ethernet 1000 Series Switches.
- Urgency
- Medium priority; while XSS and DoS are concerning for industrial environments, there is no indication of remote unauthenticated code execution.
- Action
- Apply Cisco security updates addressing CVE-2026-20177 and CVE-2026-20232.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all EPSS-scored CVEs.
Advisory coverage (4)
- medium[NEW] [medium] Cisco Industrial Ethernet 1000 Series Switches: Multiple vulnerabilitiescert-bund · 2026-08-20
- mediumCVE-2026-20177: A vulnerability in the handling of management plane packets by Cisco Industrial Ethernet (IE) …nvd · 2026-08-19
- criticalCisco Advance Notification for Publication of August 19, 2026, Security Advisoriescisco-psirt · 2026-08-19
- highCisco Industrial Ethernet 1000 Series Switches Denial of Service Vulnerabilitycisco-psirt · 2026-08-19
External references
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