Security Advisory Desk
unratedQCS priority 70/100Cisco

Cisco Advance Notification for Publication of September 2, 2026, Security Advisories

Cisco will disclose new security vulnerabilities on September 2, 2026, affecting several products including their Desk Phone series, IOS XR software, Nexus 9000 switches, Silicon One, and Secure Email. Customers are strongly encouraged to upgrade to the fixed software versions once released to fully address these issues.

Published 26/8/2026, 4:00:00 pmVerified 31/8/2026, 8:48:26 pmRevision 1
Cisco unrated network security advisory visual

In plain language

What this advisory means

Cisco will disclose new security vulnerabilities on September 2, 2026, affecting several products including their Desk Phone series, IOS XR software, Nexus 9000 switches, Silicon One, and Secure Email. Customers are strongly encouraged to upgrade to the fixed software versions once released to fully address these issues.

Technical explanation

How the issue affects the environment

Cisco's Product Security Incident Response Team plans to publish advisories revealing details of security vulnerabilities along with fixed software releases on September 2, 2026. The affected products include Desk Phone models 9800, 7800, 8800, and 8875 Series Software, IOS XR Software with a security hardening update, Nexus 9000 Series Switches, Silicon One, and Secure Email. These vulnerabilities require customers to upgrade to the new software versions to achieve full remediation. No interim workarounds are available. The disclosures follow Cisco's risk-based vulnerability disclosure model, with security advisories regularly scheduled bi-monthly.

Operational impact

Why teams should care

Until customers upgrade to the fixed releases, their Cisco devices may remain exposed to undisclosed security vulnerabilities, potentially risking operational security and network stability. Organizations relying on affected Cisco products should prepare for timely software updates to maintain security posture, as unpatched vulnerabilities could lead to exploitation.

Immediate action

Cisco strongly recommends customers upgrade to the fixed software releases that will accompany the vulnerability disclosures on September 2, 2026, to fully remediate the security issues.

Affected and fixed releases

Affected versionsConfirm in the official vendor advisory
Fixed versionsConfirm in the official vendor advisory

Temporary risk reduction

No workarounds are available according to the advisory. Customers should plan for timely software upgrades once fixes are published.

Evidence and validation checklist

  • Advance notification published by Cisco PSIRT on 2026-08-26
  • Announcement of vulnerability disclosures and fixed releases scheduled for September 2, 2026
  • Explicit recommendation to upgrade to fixed software to fully remediate vulnerabilities
  • No workarounds mentioned in the advisory

Authoritative reference

Cisco PSIRT Advisories

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

Open source