VulnSocial

CVE-2026-20177Disclosure

LOWCVSS 5.3 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

A vulnerability in the handling of management plane packets by Cisco Industrial Ethernet (IE) 1000 Series Switches could allow an unauthenticated, remote attacker to cause the device manager, SSH, or API to become inaccessible.This vulnerability is due to insufficient protection against management plane flooding attacks. An attacker could exploit this vulnerability by sending a high rate of ICMP, SSH, or HTTP traffic to an affected device. A successful exploit could allow the attacker to cause the CPU of the device to increase, resulting in a denial of service (DoS) condition on the device manager web GUI, SSH, or API. Data traffic through the device is not affected.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-770

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-08-27: 1Technical Details · 2026-08-27: 108-27
Signal classification1 categories
Disclosure
1100.0%
Full discourse1 post
  • Ryx@PadhiyarRushi
    Disclosure

    🚨 NEW OT VULNERABILITY: CVE-2026-20177 Cisco released a security advisory on a Denial of Service (DoS) flaw in Cisco Industrial Ethernet 1000 Series Switches. An unauthenticated remote attacker can completely knock out switch management. Technical breakdown below 🧵👇

    Post summary

    Cisco has disclosed a Denial of Service vulnerability (CVE‑2026‑20177) affecting its Industrial Ethernet 1000 Series switches, allowing unauthenticated remote attackers to disrupt switch management. No PoC, exploit, or mitigation details are included.

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