
6 Citrix Flaws Expose XenServer 8.4 and 9 in October Update
Security advisories on October 13, 2026, identify six vulnerabilities in Citrix XenServer and UniconOS, requiring immediate attention from infrastructure administrators.

Security advisories on October 13, 2026, identify six vulnerabilities in Citrix XenServer and UniconOS, requiring immediate attention from infrastructure administrators.

A high-severity stack-based buffer overflow in SQL Server allows network-based privilege escalation for attackers who already have authorization.

A high-severity heap-based buffer overflow in Office Access lets remote attackers run code without authentication, affecting specific LTSC and M365 builds.

Microsoft confirms a heap-based buffer overflow in the Windows Media Video Decoder allows remote code execution on multiple operating system versions.

Cisco releases critical hardening updates for its email gateway after internal testing revealed two vulnerabilities currently under active exploitation in the wild.

A stack-based buffer overflow in Juniper SRX devices permits unauthenticated attackers to run code as root or disrupt service via GRE tunnels.

A severe flaw in the git-diff package allows attackers to run arbitrary shell commands via crafted diff strings, affecting versions prior to 2.0.7.

Fortinet disclosed a critical flaw in October 2026 that allows remote attackers to bypass GUI authentication and execute unauthorized code on vulnerable appliances and PaaS instances.

Microsoft confirms a heap-based buffer overflow in Windows Error Reporting allows remote attackers to execute code without authentication.

Microsoft confirms a heap-based buffer overflow in Windows Media Foundation enables remote code execution by unauthorized attackers via network access.

Default settings and forgotten permissions create open doors that attackers exploit without needing to break encryption or inject malicious code into your software.

Attackers can exploit a high-severity flaw in Risesoft-y9 Digital-Infrastructure to write arbitrary files, potentially leading to remote code execution without authentication.

A buffer overflow occurs when code writes data beyond a memory block's boundary, corrupting adjacent instructions and allowing attackers to hijack execution flow.

A critical flaw in Ivanti Neurons Patch for Intune allows remote authenticated attackers to leak sensitive authentication data via an exposed dangerous endpoint.

Software composition analysis identifies known weaknesses in third-party code, but it cannot detect logical flaws or runtime configuration errors within those components.

A critical authentication bypass in obsidian-tc allows any valid user token to read, write, or delete data in any configured vault prior to version 1.3.1.

Integer overflow vulnerabilities allow attackers to bypass security checks by wrapping numbers around to negative values, enabling unauthorized memory access.

Page builders execute code on the server side, turning visual design tools into high-risk entry points for attackers who bypass standard input validation.

A critical authentication flaw in Netherman Portal allows unauthenticated attackers to hijack accounts by exploiting missing rate limits and verbose error messages.

A critical flaw in PraisonAI allows remote attackers to bypass authentication, access private context, and trigger agent workflows without any credentials.

Wordfence Argus identified a heap buffer overflow in Ghostscript that allows attackers to execute code on servers processing uploaded PDF documents.

A critical vulnerability in Crawl4AI allows attackers to bypass network boundaries and extract sensitive internal data through manipulated web scraping requests.

A CVSS 9.3 vulnerability in openapi-typescript-codegen lets attackers inject JavaScript through malicious OpenAPI documents, risking remote code execution in generated clients.

A critical identity flaw in Vikunja versions prior to 2.4.0 lets attackers use valid share links to scrape task data and user details from any project on the server.