Advisory [CVE-2026-20212 +10] Cisco Advance Notification for Publication of September 2, 2026, Security Advisories
This security Cisco advisory covers CVE-2026-20212 and CVE-2026-20274 and 9 more CVEs.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations. This bulletin covers 11 CVEs; its score, affected versions and guidance may apply to different issues within that bulletin.
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Summary
On September 2, 2026, the Cisco Product Security Incident Response Team (PSIRT) published the following advisories:
Cisco Security Advisory CVE ID
Security Impact Rating CVSS Base Score
Cisco IOS XR Software Security Hardening Release: September 2026
Critical 9.8
Cisco Nexus 9000 Series Switches Silicon One Remote Code Execution Vulnerability
Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Denial of Service Vulnerability High
7.5
Cisco Secure Email Secure/Multipurpose Internet Mail Extensions Ciphertext Decryption Vulnerabilities
Medium 5.9
To remediate the vulnerabilities that were disclosed on September 2, 2026, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories.
For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the Foundation: A Predictable, Customer-Focused Response to AI-Accelerated Vulnerability Discovery.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · medium-confidence parse· fetched 28 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 28 days ago·verify at source
Mitigation checklist
- On September 2, 2026, the Cisco Product Security Incident Response Team (PSIRT) will publish advisories to disclose security vulnerability information along with fixed software releases for the following Cisco products: Desk Phone 9800, 7800 and 8800, and 8875 Series Software IOS XR Software (security hardening release) Nexus 9000 Series Switches Silicon One Secure Email To fully remediate vulnerabilities to be disclosed on September 2, 2026, Cisco strongly recommends that customers upgrade to the fixed software indicated in the advisories.
Official advisory · medium-confidence parse· fetched 28 days ago·verify at source
More Cisco advisories
- CVE-2026-76418Oct 28, 2026Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense
- cisco-sa-notice-I8z3n6lKOct 28, 2026Cisco Advance Notification for Publication of November 4, 2026, Security Advisories
- CVE-2026-105482Oct 27, 2026Vulnerabilities in Node.js Affecting Cisco Products: October 2026
- cisco-sa-emudhra-info-ScS22A1rOct 23, 2026Cisco Informational for Emergency Distrust of eMudhra Root and Intermediate Certificate
- CVE-2026-109618Oct 21, 2026Vulnerabilities in PHP Affecting Cisco Products: October 2026
- CVE-2026-76445Oct 21, 2026Multiple Cisco Products Snort 3 Denial of Service Vulnerability
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