Security Advisory Desk
mediumQCS priority 82/100Cisco

Cisco Industrial Ethernet 1000 Series Switches Stored Cross-Site Scripting Vulnerability

A security flaw in the web management interface of Cisco Industrial Ethernet 1000 Series Switches lets an attacker who has legitimate access inject malicious code. This can trick users into running harmful scripts without their knowledge. Cisco has released updates to fix this issue, but there are no other temporary fixes available.

Published 19/8/2026, 4:00:00 pmVerified 19/8/2026, 6:18:18 pmRevision 1
Cisco medium network security advisory visual

In plain language

What this advisory means

A security flaw in the web management interface of Cisco Industrial Ethernet 1000 Series Switches lets an attacker who has legitimate access inject malicious code. This can trick users into running harmful scripts without their knowledge. Cisco has released updates to fix this issue, but there are no other temporary fixes available.

Technical explanation

How the issue affects the environment

The vulnerability exists in the web-based management interface of Cisco IE 1000 Series Switches. It stems from insufficient validation of user-supplied input, allowing an authenticated remote attacker to perform stored cross-site scripting (XSS) by injecting malicious script code into specific interface pages. When a different user views those pages, the malicious code executes within their browser context, potentially leading to unauthorized actions or data exposure. Exploitation requires valid user credentials. Cisco has released software updates starting from IE 1000 Series release 1.9.6 to remediate this issue; no known workarounds exist.

Operational impact

Why teams should care

If exploited, attackers with valid credentials can inject harmful scripts that run when other users access the management interface. This could enable attackers to steal session information, manipulate the interface, or perform unauthorized actions impersonating other users. The medium severity rating reflects the potential impact balanced against the need for authenticated access. Organizations should apply updates promptly to prevent exposure and maintain secure device management.

Immediate action

Upgrade Cisco IE 1000 Series Switches to software release 1.9.6 or later as provided by Cisco to fully remediate the vulnerability.

Affected and fixed releases

Affected versionsCisco IE 1000 Series Switches prior to release 1.9.6
Fixed versionsCisco IE 1000 Series Switches release 1.9.6

Temporary risk reduction

There are no workarounds available that address this vulnerability; upgrading to the fixed software release is required.

Evidence and validation checklist

  • Cisco Security Advisory cisco-sa-ie1k-NgXUFF52 published August 19, 2026
  • Description of insufficient input validation leading to stored XSS in web management interface
  • Requirement for valid user credentials to exploit
  • Fixed software release versions provided by Cisco
  • No available workarounds mentioned
  • Medium security impact rating

Authoritative reference

Cisco PSIRT Advisories

QCS detected and normalized this record from the official source. Vendor guidance remains authoritative.

Open source