OTPulse

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

Low Riskcisco-sa-notice-f2SiMFxlAug 26, 2026
Cisco
IT in OT - Cisco networking products are commonly deployed in OT environments
Summary

Cisco PSIRT will publish security advisories on September 2, 2026, disclosing vulnerabilities and fixed software releases for Desk Phone 9800, 7800, 8800, and 8875 Series Software; IOS XR Software (security hardening release); Nexus 9000 Series Switches Silicon One; and Secure Email. Cisco recommends customers upgrade to fixed software indicated in the advisories once published.

What this means
What could happen
This is an advance notice only; actual vulnerabilities and impacts are not yet disclosed. Until the September 2, 2026 advisories are published, affected Cisco products (IOS XR, Nexus 9000 switches, Secure Email, and SIP software) carry unknown security risks that could potentially impact network infrastructure and communications systems.
Who's at risk
Organizations using Cisco network infrastructure equipment, particularly those operating Nexus 9000 Series switches (common in data centers and large enterprise networks), IOS XR-based routers (used in service provider and large enterprise core networks), Secure Email gateway appliances (email security), and SIP-based voice systems (IP telephony). This notice does not specify which equipment types or sectors are affected; details will follow on September 2, 2026.
How it could be exploited
Exploitation details are not yet available. Once the September 2, 2026 advisories are published, review the vulnerability descriptions and associated attack vectors for each affected product.
Prerequisites
  • Unknown until advisories are published on September 2, 2026.
Patches not yet availableMultiple Cisco products affectedNetwork infrastructure impacts likely
Affected products (4)
4 pending
ProductAffected VersionsFix Status
IOS XR SoftwareAll versionsNo fix yet
Secure EmailAll versionsNo fix yet
Nexus 9000 Series SwitchesAll versionsNo fix yet
Session Initiation Protocol (SIP) SoftwareAll versionsNo fix yet
Remediation & Mitigation
0/3
Do now
0/2
HOTFIXMonitor Cisco PSIRT advisories published on September 2, 2026 for details on affected products and required fixes
HARDENINGSubscribe to Cisco security notifications to receive alerts when advisories are published
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

Secure Email
HOTFIXPlan firmware and software updates for IOS XR, Nexus 9000 Series Switches, Secure Email, and SIP software within your maintenance windows once fixed versions are released
View full vendor advisory
API: /api/v1/advisories/5f39862b-19a9-4770-8034-14150beae91f

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