// #actively-exploited
28 articles — page 1 of 2
Cisco Catalyst SD-WAN Manager CVE-2026-20262 Actively Exploited — Arbitrary File Overwrite Escalates to Root
A file upload vulnerability in Cisco Catalyst SD-WAN Manager is under active exploitation, allowing an attacker with network-operator level access to overwrite arbitrary files on the underlying operating system and escalate privileges to root. CISA added CVE-2026-20262 to the Known Exploited Vulnerabilities catalogue on 16 June, setting a federal remediation deadline.
PAN-OS GlobalProtect CVE-2026-0257 (CVSS 9.3): Authentication Bypass Exploited Against Government and Critical Infrastructure
Palo Alto Networks has confirmed active exploitation of CVE-2026-0257, a critical authentication bypass in the GlobalProtect gateway that allows an unauthenticated attacker to establish VPN sessions as arbitrary users. CISA has added the flaw to the Known Exploited Vulnerabilities catalogue, and Palo Alto's Unit 42 has observed exploitation targeting government and critical infrastructure networks since at least 12 June.
SimpleHelp Remote Support: New OIDC Flaw Lets Unauthenticated Attackers Create Rogue Privileged Technician Accounts
A new authentication vulnerability in SimpleHelp Remote Support — distinct from the path traversal and privilege escalation flaws patched earlier in 2026 — allows an unauthenticated attacker to exploit a flaw in the OIDC single sign-on implementation to create privileged technician accounts with full remote session capabilities. SimpleHelp has released emergency patches; exploitation has been observed in the wild.
Ivanti Sentry CVE-2026-10520: CVSS 10.0 Pre-Authentication RCE Exploited After PoC Release
Ivanti has disclosed CVE-2026-10520, a CVSS 10.0 pre-authentication remote code execution vulnerability in Ivanti Sentry (formerly MobileIron Sentry) that is being actively exploited following public proof-of-concept release. A companion OS command injection flaw CVE-2026-10523 (CVSS 9.4) affects the same platform. Both require immediate action for all organisations running Ivanti Sentry in their mobile device management infrastructure.
Langflow CVE-2026-5027 Exploitation Accelerates: AI Workflow Builder's Path Traversal RCE Under Active Attack
Exploitation of CVE-2026-5027 in Langflow, the AI workflow builder, has intensified following public PoC release. The path traversal remote code execution vulnerability, added to CISA's KEV on 8 June, is being used to deploy credential stealers and post-exploitation agents against organisations running unsecured Langflow instances. Upgrade to Langflow 1.3.5 immediately.
Google Chrome Zero-Day CVE-2026-11645: V8 Out-of-Bounds Write Actively Exploited Before Patch
Google has released Chrome 149.0.7762.95 patching CVE-2026-11645, an out-of-bounds write in the V8 JavaScript engine that was actively exploited before disclosure. CISA has added the flaw to the Known Exploited Vulnerabilities catalogue. All users and enterprise deployments should update immediately — CISA's federal deadline is 30 June.
Linux Kernel CVE-2026-23111: nf_tables Use-After-Free Enables Container Escape and Root Privilege Escalation
A use-after-free vulnerability in the Linux kernel's nf_tables netfilter subsystem allows unprivileged users to escalate to root and break container isolation. Public proof-of-concept code published 9 June makes this an immediate remediation priority across all major Linux distributions running kernel versions 5.15 through 6.10.
Microsoft June 2026 Patch Tuesday: 198 CVEs and Six Zero-Days Including Wormable CVSS 9.8 HTTP.sys Flaw
Microsoft's June 2026 Patch Tuesday addresses 198 vulnerabilities across Windows, Office, Azure, and server components — including three CVSS 9.8 critical remote code execution flaws and six publicly disclosed zero-days. HTTP.sys CVE-2026-47291 is wormable, requiring no authentication or user interaction against any Windows Server with IIS or HTTP API exposed.
CVE-2026-50751: Check Point Security Gateway Authentication Bypass Actively Exploited in Ransomware Campaigns
CISA added CVE-2026-50751 to the Known Exploited Vulnerabilities catalogue on 8 June with a three-day remediation deadline and confirmed ransomware campaign use. The vulnerability is a CVSS 9.3 authentication bypass in Check Point Security Gateway's IKEv1 VPN protocol handling that allows unauthenticated attackers to bypass remote access VPN authentication entirely. An emergency hotfix is available.
CVE-2026-42271: BerriAI LiteLLM Command Injection Reaches CISA KEV — AI Infrastructure Under Attack
CISA added CVE-2026-42271 in BerriAI LiteLLM to the Known Exploited Vulnerabilities catalogue on 8 June, confirming active exploitation of a command injection vulnerability that allows API keys with limited privileges to execute arbitrary commands on the LiteLLM host. Organisations running LiteLLM as an AI gateway should update to v1.83.7-stable immediately.
CVE-2026-45247: CISA Adds Mirasvit Magento Cache Warmer RCE to KEV — Unauthenticated PHP Deserialization Exploited in Wild
CISA added CVE-2026-45247 to the Known Exploited Vulnerabilities catalogue on 3 June, confirming active exploitation of a CVSS 9.8 PHP deserialization vulnerability in the Mirasvit Full Page Cache Warmer extension for Magento 2. Attackers exploit a malicious serialised cookie value to execute arbitrary code without authentication. The patch has been available since 25 May; organisations running Mirasvit FPC Warmer must update immediately.
Microsoft Exchange Server Zero-Day CVE-2026-42897 Actively Exploited in XSS Attacks — OOB Mitigation Available, No Patch Yet
Microsoft disclosed an actively exploited cross-site scripting zero-day in Exchange Server (CVE-2026-42897) that allows attackers to inject malicious scripts into Outlook Web App sessions, hijack authenticated user sessions, and exfiltrate email content. No patch is available. Microsoft deployed an Emergency Exchange Mitigation Service (EEMS) rule as an interim control while a patch is developed.
Cisco Catalyst SD-WAN CVE-2026-20182 CVSS 10.0 Authentication Bypass Exploited as Zero-Day — Attackers Injecting Rogue SD-WAN Devices
Cisco disclosed a CVSS 10.0 authentication bypass in the Catalyst SD-WAN Manager that has been actively exploited as a zero-day, allowing unauthenticated attackers to inject rogue SD-WAN devices into the management plane and intercept or reroute enterprise WAN traffic. The vulnerability has been added to CISA's Known Exploited Vulnerabilities catalogue with a 72-hour patching deadline for federal agencies.
PAN-OS CVE-2026-0300 — Unauthenticated RCE Zero-Day Actively Exploited in Firewall Espionage Attacks
A critical unauthenticated remote code execution vulnerability in Palo Alto Networks PAN-OS has been under active exploitation since at least early April 2026, linked to espionage-motivated threat actors targeting government and critical infrastructure networks. CVE-2026-0300 affects the User-ID authentication portal on VM-Series and hardware firewalls; CISA added it to the KEV catalogue on 6 May 2026. Patches are available — apply immediately.
'Sorry' Ransomware Deploys en Masse via cPanel CVE-2026-41940 — 44,000 Hosts Compromised Within 48 Hours of Patch
A ransomware group tracking as 'Sorry' has leveraged the recently-patched cPanel/WHM authentication bypass (CVE-2026-41940) to compromise at least 44,000 web hosting servers globally, deploying a Go-compiled Linux encryptor within 48 hours of the vulnerability's public patch release. The speed of mass exploitation underscores the extreme urgency of applying the cPanel/WHM hotfix.
Linux CopyFail LPE Added to CISA KEV With Active Exploitation Confirmed — CVE-2026-31431
CISA has added CVE-2026-31431 — the Linux kernel copy-on-write race condition LPE disclosed last week as 'CopyFail' — to the Known Exploited Vulnerabilities catalogue following confirmed active exploitation. All major Linux distributions have patches available. Federal agencies face a May 20 remediation deadline and all enterprise organisations should treat kernel patching as urgent.
Linux 'CopyFail' Kernel Privilege Escalation — Root Access on All Major Distributions Since 2017
A newly weaponised local privilege escalation vulnerability in the Linux kernel's copy-on-write mechanism allows unprivileged local users to gain root access on virtually all major Linux distributions running kernels from 2017 onwards. A working public exploit has been released. Kernel patches are available; organisations running Linux servers, containers, and cloud instances should patch immediately.
cPanel and WHM CVE-2026-41940 — CVSS 9.8 Authentication Bypass Exploited as Zero-Day Before Patch
CVE-2026-41940, a CVSS 9.8 authentication bypass in cPanel and WHM web hosting control panel software, was exploited in the wild before the vendor issued a patch. All versions from 11.40 onwards are affected. Proof-of-concept code is now public. Web hosting providers, managed service providers, and any organisation running cPanel/WHM for server management should apply the emergency patch immediately.
CISA KEV Additions: Windows Shell Spoofing CVE-2026-32202 and Cisco SD-WAN Sensitive File Exposure CVE-2026-20133
CISA's late-April Known Exploited Vulnerabilities additions include a Windows Shell protection mechanism failure under active exploitation and a Cisco Catalyst SD-WAN Manager flaw allowing unauthenticated access to sensitive OS files. Federal agencies face a May 12 remediation deadline for CVE-2026-32202; enterprise organisations should treat both additions as confirmation of active threat actor interest and patch accordingly.
DPRK's Sapphire Sleet Backdoors Axios npm Package: 100 Million Weekly Downloads at Risk
North Korea's Sapphire Sleet compromised an axios npm maintainer account on March 31, publishing backdoored versions 1.14.1 and 0.30.4 that delivered a cross-platform RAT during a three-hour exposure window. Axios has approximately 100 million weekly downloads. CISA issued Advisory AA26-110A on April 20 — organisations that ran npm installs during the window should treat their CI/CD pipeline as compromised and rotate all secrets immediately.
CISA Adds Four Exploited Flaws to KEV — SimpleHelp RMT and Samsung MagicINFO Head New Additions
CISA's Known Exploited Vulnerabilities catalogue has grown by four entries including critical flaws in SimpleHelp remote management tooling and Samsung's MagicINFO digital signage platform. Federal agencies face a May 2026 remediation deadline. Enterprise operators of RMM tools and display infrastructure should treat these as urgent.
FIRESTARTER Backdoor Persists on Cisco Firepower Devices After Patching — Federal Agency Confirmed Victim
A joint CISA and NCSC advisory reveals FIRESTARTER, a sophisticated backdoor implanted on Cisco FTD and ASA firewalls that survives firmware updates and reimaging. At least one US federal agency is a confirmed victim. Defenders must verify device integrity rather than assume patching closed the access.
LMDeploy RCE Vulnerability CVE-2026-33626 Weaponised in the Wild 13 Hours After Disclosure
A critical remote code execution flaw in LMDeploy, a widely used LLM inference serving framework, was exploited in active attacks just 13 hours after public disclosure. Organisations running self-hosted AI inference infrastructure must treat these platforms with the same urgency as any internet-exposed web application server — because attackers already do.
CISA Adds Quest KACE (CVSS 10.0), Kentico Xperience, and Zimbra ZCS to Known Exploited Vulnerabilities — Federal Deadline May 4
CISA's April 2026 KEV additions include a CVSS 10.0 unauthenticated SQL injection in Quest KACE Systems Management Appliance, active exploitation of Kentico Xperience CMS, and Zimbra Collaboration Suite vulnerabilities. Federal agencies have a May 4 remediation deadline; enterprise organisations should treat confirmed KEV additions as indicators of active attacker tooling and prioritise these systems immediately.