Cisco Security Advisoriescisco-sa-notice-L4XfJg8S

Cisco Advance Notification for Publication of August 5, 2026, Security Advisories

On August 5, 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 Catalyst SD-WAN Software Security Hardening Release: August 2026 CVE-2026-20303CVE-2026-20304CVE-2026-20310CVE-2026-20312CVE-2026-20313 Critical 9.9 Cisco IOS XE Software Security Hardening Release: August 2026 CVE-2026-20267CVE-2026-20268CVE-2026-20269CVE-2026-20270CVE-2026-20271CVE-2026-20272CVE-2026-20273 Critical 9.8 Cisco Integrated Management Controller Argument Injection Vulnerabilities CVE-2026-20200CVE-2026-20288 High 8.8 Cisco IOS Software and IOS XE Software Extensible Messaging Client Protocol Denial of Service Vulnerability CVE-2026-20301 High 8.6 Cisco IOS XE Software Blocks Extensible Exchange Protocol Denial of Service Vulnerability CVE-2026-20263 High 8.6 Cisco IOS XE Software SNMP Denial of Service Vulnerability CVE-2026-20124 High 7.7 Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability CVE-2026-20294 Medium 6.5 Cisco IOS XE Software Web-Based Management Interface Denial of Service Vulnerability CVE-2026-20311 Medium 6.3 Cisco RoomOS Logging Subsystem Information Disclosure Vulnerability CVE-2026-20289 Medium 5.7 Cisco Terminal Services Agent Firewall Rules Bypass Vulnerability CVE-2026-20028 Medium 5.0 Cisco Integrated Management Controller Cross-Site Scripting Vulnerability CVE-2026-20198 Medium 4.8 < Security Impact Rating: Informational

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InformationalCVSS not listedInformational severity

Scope

What the vendor says is affected

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Timeline

When this advisory changed

Aug 5, 2026 at 4:01 PM UTC
Published by Cisco
The publication date reported by the vendor.
Aug 20, 2026 at 2:20 AM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Aug 26, 2026 at 3:50 PM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-20301View CVSS, KEV, EPSS, and threat context CVE-2026-20263View CVSS, KEV, EPSS, and threat context CVE-2026-20124View CVSS, KEV, EPSS, and threat context CVE-2026-20294View CVSS, KEV, EPSS, and threat context CVE-2026-20311View CVSS, KEV, EPSS, and threat context CVE-2026-20289View CVSS, KEV, EPSS, and threat context CVE-2026-20028View CVSS, KEV, EPSS, and threat context CVE-2026-20198View CVSS, KEV, EPSS, and threat context

Source

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Vendor: Cisco
Advisory ID: cisco-sa-notice-L4XfJg8S
Last source check: Sep 13, 2026 at 4:50 AM UTC

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What the vendor says is affected

When this advisory changed

CVEs named in this advisory

Related advisories from Cisco

Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability

Cisco Terminal Services Agent Firewall Rules Bypass Vulnerability

Cisco IOS Software and IOS XE Software Extensible Messaging Client Protocol Denial of Service Vulnerability

Cisco IOS XE Software SNMP Denial of Service Vulnerability

Cisco IOS XE Software Blocks Extensible Exchange Protocol Denial of Service Vulnerability

Cisco RoomOS Logging Subsystem Information Disclosure Vulnerability