Citrix NetScaler CVE-2026-8452 exploited in the wild

🚨 ACTIVE EXPLOITATION

• CISA lists Red Hat Libuser race condition CVE-2015-3246 as exploited CVE-2015-3246
  CISA has added a Red Hat Libuser race condition to its Known Exploited Vulnerabilities catalog.

  • Red Hat Libuser installations are affected.
  • Authenticated local users can exploit the race condition to corrupt /etc/passwd.
  • The flaw can cause denial of service or privilege escalation.
  • CISA lists CVE-2015-3246 in its Known Exploited Vulnerabilities catalog.
    📎 Coverage: nvd.nist.gov · 👁 via CISA KEV

• CVE-2015-5287: Red Hat ABRT privilege-escalation flaw exploited CVE-2015-5287
  CISA lists a Red Hat ABRT privilege-escalation flaw as actively exploited.

  • Red Hat Automatic Bug Reporting Tool (ABRT) users are affected.
  • The sosreport functionality mishandles symbolic links and uses predictable filenames.
  • A local attacker with certain permissions can exploit a symlink attack to gain privileges.
    📄 Source: nvd.nist.gov · 📎 Coverage: nvd.nist.gov · 👁 via CISA KEV

• CISA KEV lists CVE-2019-1068 SQL Server remote-code flaw CVE-2019-1068
  CVE-2019-1068 is an exploited remote-code-execution flaw in Microsoft SQL Server.

  • Microsoft SQL Server customers are affected.
  • The vulnerability enables remote code execution in the SQL Server Database Engine service account context.
  • CISA lists CVE-2019-1068 in its Known Exploited Vulnerabilities catalog.
    📎 Coverage: nvd.nist.gov · 👁 via CISA KEV

• UAT-10147 Exploited AjaxPro CVE-2021-23758 Against Web Servers CVE-2021-23758
  UAT-10147 exploited AjaxPro CVE-2021-23758 for remote code execution on web servers.

  • Government, education, media, technology, and gaming organizations using Windows or Linux web servers were targeted.
  • Ajax.NET Professional (AjaxPro) was vulnerable to unsafe deserialization of untrusted data, enabling arbitrary .NET class execution.
  • UAT-10147 used the publicly disclosed CVE-2021-23758 in automated, AI-assisted intrusion campaigns alongside Metasploit and ysoserial.
  • Compromised servers were used to deploy web shells, BadIIS, Noodle RAT, SPECTRE, or Meterpreter for SEO fraud, data theft, and persistence.
  • The campaign's exposed infrastructure included 139.180.197[.]150 and a target list of roughly 170,000 URLs.
    📄 Source: nvd.nist.gov · 📎 Coverage: thehackernews.com · 👁 via CISA KEV

• UAT-10147 exploits Linux kernel CVE-2022-0995 for privilege escalation CVE-2022-0995
  UAT-10147 exploits CVE-2022-0995 to escalate privileges on Linux web servers.

  • The flaw affects Linux kernel systems, including web servers in government, education, media, technology and gaming sectors.
  • CVE-2022-0995 is an out-of-bounds write in the kernel’s watch_queue event notification mechanism.
  • An unprivileged local user can write arbitrary data out of bounds to gain elevated privileges or cause denial of service.
  • UAT-10147 uses the flaw after web-server compromise alongside other privilege-escalation exploits and deploys web shells, NoodleRAT, SPECTRE or Meterpreter.
  • Talos linked the campaign to command-and-control infrastructure at 139.180.197[.]150.
    📄 Source: nvd.nist.gov · 📎 Coverage: nvd.nist.gov · 👁 via CISA KEV

• UPDATE: Citrix NetScaler CVE-2026-8452 exploited in the wild CVE-2026-8452
  Attackers are exploiting a pre-authentication memory overflow in Citrix NetScaler.

  • Citrix NetScaler ADC and NetScaler Gateway deployments configured as Gateway or AAA virtual servers are affected.
  • Versions before ADC/Gateway 14.1-72.61, 13.1-63.18, FIPS 14.1-72.61, and FIPS/NDcPP 13.1-37.272 are vulnerable.
  • A specially crafted SAML message triggers a heap overflow during signature validation without authentication.
  • Public proof-of-concept code demonstrates denial of service and potential pre-authentication remote code execution; exploitation has been reported in the wild.
    📄 Source: support.citrix.com · 📎 Coverage: bishopfox.com · 👁 via CISA KEV

💥 BREACHES & INCIDENTS

• (no items)

🔓 CVEs & KEV

• CVE-2026-54523 — CVSS 9.6 — Kyverno Critical Cross-Namespace Resource Creation (CVE-2026-54523)

• CVE-2026-76784 — CVSS 8.7 — Insufficient Cryptographic Protections in Local Device Communication Protocol...

• CVE-2026-58474 — CVSS 8.6 — whichllm before 0.5.16 Code Injection via run and snippet commandswhichllm before ...

• CVE-2026-32258 — CVSS 8.1 — Winter: Stored XSS through Editor Settings custom stylesWinter is a free, ope...

• CVE-2026-32257 — CVSS 8.1 — Winter: Stored XSS through Brand Settings custom stylesWinter is a free, open...

• CVE-2026-47841 — CVSS 7.4 — WebAuthn User Verification Bypass via Session SerializationAn application usi...

• CVE-2026-47836 — CVSS 7.2 — Spring Cloud Config Server Susceptible To TOCTOU Attack When Using SVNThe bas...

• CVE-2026-35445 — CVSS 7.1 — Winter: Authenticated backend users can bypass Users controller permission ch...

• CVE-2026-32639 — CVSS 6.8 — Winter: Broken access control in Cms\Controllers\Index allows cross-templat...

• CVE-2026-47837 — CVSS 6.8 — Spring Cloud Config Server Monitor Endpoint Does Not Validate Webhook Request...

🕵️ RESEARCH & DEEP DIVES

• GPUThor Rowhammer Attack Bypasses NVIDIA GPU ECC for Root Access
  GPUThor bypasses ECC protections on NVIDIA GPUs.

  • NVIDIA GPU users relying on ECC memory are affected.
  • The attack can cause denial of service and root-level privilege escalation.
  • GPUThor uses Rowhammer to bypass GPU error-correcting code protections.
    📎 Coverage: bleepingcomputer.com · 👁 via BleepingComputer

• Nimbus Manticore Adds TWOSTROKE-Like Backdoor and Reverse SSH Tool
  Group-IB has identified new Nimbus Manticore malware and infrastructure.

  • The activity targets defense, aerospace, IT service providers, and military organizations in the Middle East, Europe, and the United States.
  • A Windows C++ backdoor collects system information, executes commands, manages files, and supports persistence.
  • The backdoor masquerades as wtsapi32.dll and uses HTTPS to connect to hard-coded C2 servers.
  • A reverse SSH tool disguises itself as the Windows Terminal Server SDK API and connects to 172.86.98[.]113 over port 443.
    📄 Source: group-ib.com · 📎 Coverage: thehackernews.com · 👁 via The Hacker News

• Microsoft details attacks targeting LiteLLM, RAGFlow and Kestra AI workloads
  Microsoft observed attackers compromising exposed AI infrastructure to steal credentials and monetize compute.

  • Organizations deploying LiteLLM gateways, RAGFlow retrieval platforms, and Kestra workflow environments are affected.
  • Attackers targeted model-provider keys, database connection strings, tenant credentials, workflow access, and host compute.
  • LiteLLM intrusions likely exploited CVE-2026-42271 and CVE-2026-48710 for remote code execution.
  • RAGFlow activity involved possible SSRF reconnaissance, code execution, and a Python hook that intercepted LLM credentials.
  • Kestra attacks used workflow-originated shell execution, container discovery, XMRig cryptomining, and data collection.
    📎 Coverage: microsoft.com · 👁 via Microsoft Security Blog

• PATCHCORD malware targets Afghan telecoms and South Asian infrastructure
  Transparent Tribe is targeting Afghan telecoms and South Asian infrastructure with PATCHCORD malware.

  • Afghan telecom providers and South Asian critical infrastructure organizations are targeted.
  • Transparent Tribe, also known as APT36, uses the custom C/C++ PATCHCORD backdoor.
  • Phishing lures impersonate AFTEL VPN installers and telecom or network-management tools.
  • PATCHCORD executes code in memory, fingerprints hosts, enumerates processes, and checks for sandboxes.
  • The malware persists by hijacking browser shortcuts; related Sheetcord uses Windows startup and Google Sheets for C2.
    📎 <https://www.reddit.com/r/netsec/comments/1vz6179/patchcord