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CategoryAll Advisory 54 Exploit / PoC 45 Industry 22 Vulnerability 17 Threat actor 13 Malware 8 Research 6 Phishing & fraud 6 Tools 5 AI industry 3 Policy & legal 2 AI safety & security 2 Ransomware 1 Data breach 1

SeverityAll critical 38 high 47 medium 45 low 15 info 41

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

Cisco PSIRT published September 2, 2026 advisories including critical IOS XR hardening fixes and a Nexus 9000 remote code execution flaw.

Cisco's PSIRT released its September 2, 2026 batch of security advisories, including a Cisco IOS XR Software security hardening release bundling six CVEs (CVE-2026-20274 through CVE-2026-20280) rated critical with CVSS 9.8. A separate critical (CVSS 9.8) remote code execution vulnerability, CVE-2026-20212, affects Nexus 9000 Series switches with Silicon One, and a high-severity (CVSS 7.5) denial-of-service flaw, CVE-2026-20281, affects the Desk Phone 9800 Series and related SIP phones. Administrators should review the advisories and prioritize patching the critical-rated issues.

Cisco Security AdvisoriesSep 2, 16:02 UTC · 14d agoAdvisory CVE-2026-20277 CVE-2026-20278 CVE-2026-20280+6 CVEs

Cisco Nexus Dashboard Software Security Hardening Release: September 2026

Cisco released Nexus Dashboard hardening updates for multiple internally discovered vulnerabilities, grouped by CWE and not known to be exploited.

Cisco's Nexus Dashboard engineering team conducted an internal security review that found multiple vulnerabilities, addressed via software hardening releases. The issues were discovered during internal testing and are not known to be actively exploited. Cisco grouped the issues by CWE class and assigned a single CVE ID per issue before releasing fixes.

Cisco Security AdvisoriesSep 16, 16:00 UTC · 18h agoAdvisory

Cisco IOS XR Software Security Hardening Release: September 2026

Cisco released IOS XR security hardening fixes for multiple internally discovered vulnerabilities, grouped by CWE class, with no known active exploitation.

Cisco's IOS XR engineering team conducted a comprehensive internal security review and released hardening updates addressing multiple internally discovered vulnerabilities. The issues were found during internal testing and are not known to be actively exploited. Cisco grouped the vulnerabilities by CWE class and assigned a single CVE ID to each grouping to streamline patching and disclosure.

Cisco Security AdvisoriesSep 4, 18:57 UTC · 12d agoAdvisory

Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Denial of Service Vulnerability

Cisco warns of a DoS flaw in SIP software on Desk Phone 9800 and IP Phone 7800/8800 series from improper HTTP packet memory handling.

Cisco disclosed a denial of service vulnerability affecting Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 devices running Cisco SIP Software. An unauthenticated remote attacker can send a continuous stream of crafted HTTP packets, causing sustained memory consumption until the device becomes unresponsive. A manual reboot is required to recover an affected device. No CVE identifier was listed in the advisory text.

Cisco Security AdvisoriesSep 2, 16:00 UTC · 14d agoAdvisory

Cisco Crosswork Security Hardening Release: August 2026

Cisco released an August 2026 Crosswork security hardening update addressing multiple internally discovered vulnerabilities, grouped by CWE class with one CVE per grouping.

Cisco's Crosswork engineering team completed a comprehensive internal security review and shipped a hardening release fixing multiple internally discovered vulnerabilities. The issues were found during internal testing, are grouped by CWE class, and each grouping received a single CVE ID. Cisco states these vulnerabilities are not known to be actively exploited.

Cisco Security AdvisoriesAug 21, 16:54 UTC · 26d agoAdvisory

Cisco Secure Workload Software Security Hardening Release: August 2026

Cisco shipped August 2026 hardening releases for Secure Workload fixing multiple internally discovered vulnerabilities that are not actively exploited.

Cisco's Secure Workload engineering team completed an internal security review that found multiple vulnerabilities during internal testing. The issues are grouped by CWE class with a single CVE assigned per grouping, and none are known to be actively exploited. Cisco has released hardening updates for customers to patch.

Cisco Security AdvisoriesAug 19, 16:00 UTC · 28d agoAdvisory

Cisco Identity Services Engine Authorization Bypass Vulnerabilities

Cisco fixed authorization bypass flaws in ISE and ISE-PIC web management letting authenticated admins modify file descriptions via crafted HTTP requests.

Multiple vulnerabilities in the web-based management interface of Cisco Identity Services Engine and ISE Passive Identity Connector result from missing server-side validation of Administrator permissions. An authenticated remote attacker with valid Administrator credentials can submit crafted HTTP requests to modify descriptions of files on specific pages. Cisco has released software updates addressing the issues.

Cisco Security Advisoriesupdated 10:06 UTC · 21m agofirst Sep 16, 16:00 UTC · 18h agoAdvisory 18 sources

Cisco BroadWorks CommPilot Application Software Authorization Bypass Vulnerability

Cisco patched a BroadWorks CommPilot authorization bypass letting low-privileged authenticated users alter device configurations via crafted HTTP requests.

A vulnerability in the web-based management interface of Cisco BroadWorks CommPilot Application Software is caused by missing authorization checks. An authenticated remote attacker with low privileges can send crafted HTTP requests to alter configurations on select pages. Cisco has released software updates and no workarounds are available.

Cisco Security AdvisoriesSep 16, 16:00 UTC · 18h agoAdvisory

Cisco Unified Intelligence Center SQL Injection Vulnerability

Cisco patched a blind SQL injection in Unified Intelligence Center's web interface allowing authenticated local attackers to read the internal database.

Cisco disclosed a blind SQL injection vulnerability in the web-based management interface of Unified Intelligence Center, caused by insufficient validation of user-supplied input. An authenticated local attacker can send crafted requests and read the contents of the device's internal database. Exploitation requires valid user credentials, and Cisco has released software updates.

Cisco Security AdvisoriesAug 19, 16:00 UTC · 28d agoAdvisory

Cisco RoomOS Stack Overflow Vulnerability

Cisco fixed a stack overflow in the RoomOS USB driver allowing physical-access attackers to execute code with root privileges.

Insufficient boundary checks in the USB driver of Cisco RoomOS allow a buffer overflow when specific data is supplied through the USB port. An unauthenticated local attacker with physical access can connect a malicious USB device and execute arbitrary code with root privileges. Cisco has released software updates and no workarounds address the issue.

Cisco Security AdvisoriesAug 19, 16:00 UTC · 28d agoAdvisory

Cisco Industrial Ethernet 1000 Series Switches Denial of Service Vulnerability

Cisco released a fix for a management-plane flooding DoS in IE-1000 switches that can make the device manager, SSH, or API inaccessible.

Insufficient protection against management plane flooding in Cisco Industrial Ethernet 1000 Series Switches allows an unauthenticated remote attacker to send high-rate ICMP, SSH, or HTTP traffic, raising CPU usage and causing a denial-of-service condition on the device manager web GUI, SSH, or API. Data traffic through the device is not affected. Cisco has released software updates to address the issue.

Cisco Security AdvisoriesAug 19, 16:00 UTC · 28d agoAdvisory

Cisco UCS and UCS-Based Appliances UEFI Shell Secure Boot Bypass Vulnerability

Cisco disclosed a UEFI Secure Boot bypass in UCS servers and UCS-based appliances letting authenticated or physically present attackers execute unauthorized software.

Cisco published an advisory for a vulnerability in the UEFI Shell implementation of UCS servers and UCS-based appliances. Memory write commands remain available in the UEFI Shell while Secure Boot is enabled, allowing an attacker to modify UEFI memory and bypass validation checks to run unauthorized software. Exploitation requires either valid credentials for a user or admin account, or unauthenticated physical access to select the UEFI Shell boot option at boot time. The issue affects firmware boot integrity rather than the running operating system.

Cisco Security AdvisoriesSep 8, 16:00 UTC · 8d agoAdvisory

Cisco Industrial Ethernet 1000 Series Switches Stored Cross-Site Scripting Vulnerability

Cisco fixed a stored cross-site scripting flaw in Industrial Ethernet 1000 series switches exploitable by authenticated remote users.

Insufficient validation of user-supplied input in the web-based management interface of Cisco Industrial Ethernet 1000 Series Switches allows stored XSS. An authenticated remote attacker can inject malicious code into specific interface pages and execute arbitrary script in another user's context. Exploitation requires valid credentials; Cisco has released software updates.

Cisco Security AdvisoriesAug 19, 16:00 UTC · 28d agoAdvisory