♻️ Cisco IOS XE Resource-Lifecycle Control Flaw
Teams managing IOS XE infrastructure should upgrade promptly, with priority given to high-availability, edge, and heavily utilized devices.
CVE-2026-20269 affects Cisco IOS XE Software and involves improper control of a resource through its lifetime, classified under CWE-664. Cisco discovered the issue during an internal security review and released software-hardening updates. The vulnerability is rated HIGH with CVSS 8.6.
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Source: NVD
🔓 IBM Langflow MCP Endpoint Authentication Bypass
Teams running Langflow with OAuth-enabled projects should patch promptly and review exposure of the MCP composer endpoint, especially where it is reachable from untrusted networks.
CVE-2026-8446 is an authentication bypass vulnerability in the Model Context Protocol composer endpoint of IBM Langflow OSS 1.0.0 through 1.10.3. It affects deployments where mcp_composer_enabled=true, which is the default, and projects use auth_type=oauth. The flaw is rated HIGH with CVSS 7.5.
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Source: NVD
🔗 Cisco Catalyst SD-WAN File Access Link Flaw
Administrators of Catalyst SD-WAN environments should apply Cisco’s hardened software release promptly, prioritizing systems that process files or links from less-trusted sources.
CVE-2026-20313 affects Cisco Catalyst SD-WAN and involves improper link resolution before file access, classified as CWE-1284. Cisco identified the issue during an internal security review and addressed it through software-hardening releases. The vulnerability is rated HIGH with CVSS 7.7.
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Source: NVD
🗝️ Cisco Catalyst SD-WAN Stores Sensitive Data in Cleartext
Catalyst SD-WAN operators should patch urgently and assess whether sensitive data may have been stored or exposed in readable form on affected systems.
CVE-2026-20312 is a cleartext storage of sensitive information vulnerability in Cisco Catalyst SD-WAN, classified as CWE-312. Cisco discovered the issue through an internal security review and released software-hardening updates. The vulnerability is rated HIGH with CVSS 8.8.
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Source: NVD
🚨 Critical Cisco Catalyst SD-WAN Link Resolution Vulnerability
Catalyst SD-WAN administrators should treat this as an emergency maintenance item and deploy the corrected release as soon as operationally possible.
CVE-2026-20310 affects Cisco Catalyst SD-WAN and involves improper link resolution before file access, classified as CWE-59. Cisco found the issue during an internal security review and issued software-hardening releases. The vulnerability is rated CRITICAL with CVSS 9.1.
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Source: NVD
🛑 Critical Access-Control Failure in Cisco Catalyst SD-WAN
Organizations using Catalyst SD-WAN should patch immediately, with internet-facing and broadly accessible management systems at the front of the queue.
CVE-2026-20304 is an improper access control vulnerability affecting Cisco Catalyst SD-WAN, classified as CWE-284. It was identified during Cisco’s internal security review and addressed in a software-hardening release. The vulnerability is rated CRITICAL with CVSS 9.9.
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Source: NVD
⚠️ Critical Input Validation Flaw Hits Cisco Catalyst SD-WAN
Catalyst SD-WAN owners should deploy the fixed release immediately because malformed or untrusted input may reach vulnerable processing paths.
CVE-2026-20303 is an improper input validation vulnerability in Cisco Catalyst SD-WAN, classified as CWE-20. Cisco discovered it through an internal security review and released hardened software versions to address it. The vulnerability is rated CRITICAL with CVSS 9.9.
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Source: NVD
💥 Malformed XMCP Packets Can Crash Cisco IOS Devices
Network teams running Cisco IOS or IOS XE should patch urgently and restrict XMCP exposure where possible, since exploitation is remote, unauthenticated, and can interrupt device availability.
CVE-2026-20301 is a denial-of-service vulnerability in the XMCP external client protocol of Cisco IOS Software and Cisco IOS XE Software. An unauthenticated remote attacker can send a malformed XMCP packet and cause an affected device to reload unexpectedly, without knowing the XMCP client username. The vulnerability is rated HIGH with CVSS 8.6.
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Source: NVD
🧩 Cisco IOS XE Input Validation Weakness
IOS XE administrators should schedule an expedited upgrade, prioritizing externally reachable devices and systems that handle untrusted input.
CVE-2026-20273 is an improper input validation vulnerability affecting Cisco IOS XE Software, classified under CWE-20. Cisco identified the issue during an internal security review and addressed it in a software-hardening release. The vulnerability is rated HIGH with CVSS 8.6.
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Source: NVD
🚨 Critical Special-Character Handling Flaw in Cisco IOS XE
Organizations operating IOS XE should patch immediately, especially on devices exposed to administrative or protocol input from untrusted sources.
CVE-2026-20272 affects Cisco IOS XE Software and involves improper neutralization of special elements, classified under CWE-74. Cisco found the issue through an internal security review and issued software-hardening releases. The vulnerability is rated CRITICAL with CVSS 9.8.
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Source: NVD
🔀 Cisco IOS XE Control-Flow Management Vulnerability
IOS XE device owners should apply the hardened release promptly and prioritize critical routing, switching, and edge infrastructure.
CVE-2026-20271 is an insufficient control flow management vulnerability in Cisco IOS XE Software, classified under CWE-691. Cisco identified it during an internal security review and released software-hardening updates. The vulnerability is rated HIGH with CVSS 8.6.
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Source: NVD
🧮 Incorrect Calculation Flaw Affects Cisco IOS XE
Network administrators should patch IOS XE systems promptly, prioritizing devices whose failure or incorrect processing could disrupt business-critical connectivity.
CVE-2026-20270 is an incorrect calculation vulnerability affecting Cisco IOS XE Software, classified under CWE-682. The issue was found during Cisco’s internal security review and addressed through software-hardening releases. The vulnerability is rated HIGH with CVSS 8.6.
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Source: NVD