High [CVE-2026-20028 +21] Cisco Advance Notification for Publication of August 5, 2026, Security Advisories
This high-severity Cisco advisory covers CVE-2026-20028 and CVE-2026-20124 and 20 more CVEs.
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Summary
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
Critical 9.9
9.8
Cisco Integrated Management Controller Argument Injection Vulnerabilities
High 8.8
Cisco IOS Software and IOS XE Software Extensible Messaging Client Protocol Denial of Service Vulnerability 8.6
7.7
Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability Medium
6.5
Cisco IOS XE Software Web-Based Management Interface Denial of Service Vulnerability 6.3
Cisco RoomOS Logging Subsystem Information Disclosure Vulnerability 5.7
Cisco Terminal Services Agent Firewall Rules Bypass Vulnerability 5.0
Cisco Integrated Management Controller Cross-Site Scripting Vulnerability 4.8
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 9 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 · high-confidence parse· fetched 9 days ago·verify at source
Mitigation checklist
- On August 5, 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: Catalyst SD-WAN Integrated Management Controller (IMC) IOS Software IOS XE Software RoomOS Terminal Services Agent To fully remediate vulnerabilities to be disclosed on August 5, 2026, Cisco strongly recommends that customers upgrade to the fixed software indicated in the advisories.
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
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