All news with #zero-day tag

Threat Source: SharePoint Exploits and Patch Urgency

⚠ Cisco Talos reports a sharp increase in attacks against public-facing applications, with the ToolShell chain exploiting unpatched Microsoft SharePoint servers rising to over 60% of IR cases this quarter. Ransomware-related incidents fell to about 20% but show evolving tactics, including leveraging legitimate tools and compromised internal accounts for persistence and phishing. Organizations are urged to prioritize rapid patching, robust network segmentation, centralized logging, MFA, and user education to reduce exposure.

IR Trends Q3 2025: ToolShell Drives Access & Response

🛡️ Cisco Talos Incident Response observed a surge in attacks exploiting public-facing apps in Q3 2025, driven chiefly by ToolShell chains targeting on-premises Microsoft SharePoint servers. Rapid automated scanning and unauthenticated RCE vulnerabilities led to widespread compromise, highlighting the need for immediate patching and strict network segmentation. Post-compromise phishing from valid accounts and diverse ransomware families, including Warlock and LockBit, continued to impact victims.

Samsung Galaxy S25 Hacked at Pwn2Own Ireland 2025 Event

🔒 At Pwn2Own Ireland 2025, researchers from Mobile Hacking Lab and Summoning Team successfully exploited a Samsung Galaxy S25 using a five‑vulnerability chain to achieve code execution. The findings, credited to Ken Gannon and Dimitrios Valsamaras, were surrendered to Samsung under the event's coordinated disclosure rules. Hours later a second team, Interrupt Labs, used an improper input validation bug to seize camera and location access. Each team received $50,000; Samsung has 90 days to issue fixes.

Samsung Galaxy S25 Exploited on Day Two of Pwn2Own

🔓 Security researchers earned $792,750 on day two of Pwn2Own Ireland 2025, exploiting 56 unique zero-day vulnerabilities across smartphones, NAS devices, printers, cameras and smart-home gear. A five-bug chain used by Ken Gannon and Dimitrios Valsamaras successfully compromised the Samsung Galaxy S25, earning $50,000 and 5 Master of Pwn points. Several teams also exploited issues in QNAP and Synology NAS models, printers and IoT devices, and vendors now have 90 days to patch before public disclosure.

Chinese Groups Exploit ToolShell SharePoint Flaw Widespread

🔒 Symantec reports that China-linked threat actors exploited the ToolShell vulnerability in Microsoft SharePoint (CVE-2025-53770) weeks after Microsoft issued a July 2025 patch, compromising a Middle Eastern telecom and multiple government and corporate targets across regions. Attackers used loaders and backdoors such as KrustyLoader, ShadowPad and Zingdoor, and in several incidents employed DLL side-loading and privilege escalation via CVE-2021-36942. Symantec notes the operations aimed at credential theft, stealthy persistence, and likely espionage, with activity linked to groups including Linen Typhoon, Violet Typhoon, Storm-2603 and Salt Typhoon.

ToolShell SharePoint Exploit Hits Organizations Worldwide

⚠️ Symantec reports that hackers linked to China exploited the ToolShell vulnerability (CVE-2025-53770) in on-premise Microsoft SharePoint servers to target government agencies, universities, telecommunications providers, and financial firms across four continents. The zero-day, disclosed on July 20, was used to plant webshells and enable remote code execution. Attackers deployed DLL side-loading to load a Go backdoor named Zingdoor, later chained to ShadowPad, KrustyLoader, and the Sliver framework, and performed credential dumping and PetitPotam abuse to escalate to domain compromise.

CISA Confirms Exploitation of Oracle E-Business SSRF Flaw

🔒 CISA has confirmed active exploitation of CVE-2025-61884, an unauthenticated SSRF in the Oracle Configurator runtime, and added it to its Known Exploited Vulnerabilities catalog. Federal agencies are required to patch the issue by November 10, 2025. Oracle released a fix on October 11 rated 7.5 and BleepingComputer says the update blocks a leaked exploit tied to ShinyHunters and related extortion activity.

Researchers Exploit 34 Zero-Days at Pwn2Own Ireland

🔒On the first day of Pwn2Own Ireland 2025, security researchers exploited 34 unique zero-day vulnerabilities and collected $522,500 in cash awards. Team DDOS (Bongeun Koo and Evangelos Daravigkas) chained eight flaws to compromise a QNAP Qhora-322 router via its WAN interface and access a QNAP TS-453E, earning $100,000 and moving into second place on the Master of Pwn leaderboard. The Summoning Team led day one with $102,500 and 11.5 points after multiple successful root exploits. The Zero Day Initiative (ZDI) organized the event and coordinates 90-day responsible disclosure with affected vendors.

Weekly Recap: F5 Breach, Linux Rootkits, and Trends

🔒 This weekly recap highlights long-lived, stealthy intrusions and emerging tactics that are reshaping defender priorities. Chief among them, F5 disclosed a year-long breach involving the BRICKSTORM malware and stolen BIG-IP source material, while researchers uncovered new Linux rootkits such as LinkPro and campaigns abusing blockchain smart contracts for malware delivery. The report urges inventorying edge devices, prioritizing patches, and improving detection, baselining, and intelligence sharing.

Legacy Flaws in Network Edge Devices Threaten Orgs Today

🔒 Enterprises' network edge devices — firewalls, VPNs, routers, and email gateways — are increasingly being exploited due to longstanding 1990s‑era flaws such as buffer overflows, command and SQL injections. Researchers tracked dozens of zero‑day exploits in 2024 and continuing into 2025 that affected vendors including Fortinet, Palo Alto Networks, Cisco, Ivanti, and others. These appliances are attractive targets because they are remotely accessible, often lack endpoint protections and centralized logging, and hold privileged credentials, making them common initial access vectors for state‑affiliated actors and ransomware groups.

SharePoint Flaws Led to Breach at Kansas City Nuclear Plant

🔒 A foreign threat actor exploited unpatched Microsoft SharePoint vulnerabilities to infiltrate the Kansas City National Security Campus (KCNSC), which produces most non‑nuclear components for U.S. nuclear weapons. Honeywell FM&T, which manages the site for the NNSA, and the Department of Energy did not respond to requests for comment. Federal responders, including the NSA, were onsite in early August after Microsoft issued fixes on July 19. Attribution remains disputed between Chinese-linked groups and possible Russian actors; there is no public evidence that classified information was taken.

Envoy Air Confirms Oracle E-Business Suite Data Theft

🔒 Envoy Air confirmed that data was compromised from its Oracle E-Business Suite application after the Clop extortion gang listed American Airlines on its leak site. The carrier said it immediately launched an investigation, contacted law enforcement, and determined that no sensitive or customer data were affected, though limited business information and commercial contact details may have been exposed. The incident is tied to an August campaign by Clop, which exploited an E-Business Suite zero‑day (CVE‑2025‑61882) and is now publishing claimed stolen files.

Hackers Deploy Rootkit via Cisco SNMP Zero-Day on Switches

⚠️Threat actors exploited a recently patched SNMP remote code execution flaw (CVE-2025-20352) in older Cisco IOS and IOS XE devices to deploy a persistent Linux rootkit. Trend Micro reports the campaign targeted unprotected 9400, 9300 and legacy 3750G switches and has been tracked as Operation Zero Disco, named for the universal password that contains 'disco'. The implant can disable logging, bypass AAA and VTY ACLs, hide running-configuration items and enable lateral movement; researchers recommend low-level firmware and ROM-region checks when compromise is suspected.

Gladinet patches zero-day in CentreStack file sharing

🔒 Gladinet released an urgent update for its CentreStack business solution to fix a local file inclusion flaw tracked as CVE-2025-11371, which was abused in the wild as a zero-day. The LFI allowed attackers to read Web.config, extract the ASP.NET machine key, and then leverage a prior deserialization RCE (CVE-2025-30406) to achieve remote code execution. Administrators should upgrade to CentreStack version 16.10.10408.56683 immediately; if patching is not possible, disable the temp handler in Web.config for the UploadDownloadProxy component as a temporary mitigation.

Attackers Use Cisco SNMP Flaw to Deploy Linux Rootkits

🛡️ Researchers disclosed a campaign, Operation Zero Disco, that exploited a recently patched SNMP stack overflow (CVE-2025-20352) in Cisco IOS and IOS XE devices to deploy Linux rootkits on older, unprotected switches. The attackers achieved remote code execution and persistence by installing hooks into IOSd memory and setting universal passwords that include the string "disco." Targets included legacy 3750G and 9300/9400 series devices lacking EDR protections.

Nation-state Breach Exposes F5 BIG-IP Source Code

⚠️ F5 has confirmed a nation-state actor maintained persistent access to its development systems, including the BIG-IP product development environment and engineering knowledge management platforms, with discovery in August and customer notification on October 15. The breach included stolen files containing BIG-IP source code and information on undisclosed vulnerabilities. While F5 reports no known active exploitation, it and CISA have urged immediate patching and mitigations, and the US government delayed public disclosure in September after a Justice Department order.

Apple Raises Top Bug Bounty to $2M for Zero-Click Exploits

🔒 Apple has expanded its Security Bounty program, doubling the top award to $2,000,000 for exploit chains that achieve goals comparable to sophisticated mercenary spyware. The company says bonuses for Lockdown Mode bypasses and vulnerabilities found in beta software can push payouts past $5 million. New, higher rewards include $100,000 for a complete Gatekeeper bypass, $1,000,000 for broad unauthorized iCloud access, up to $300,000 for one-click WebKit sandbox escapes, and up to $1,000,000 for wireless proximity exploits. Apple is also introducing Target Flags, a mechanism that lets researchers demonstrate exploitability and qualify for accelerated awards processed immediately after verification, even before a fix is released.

Microsoft October Patch Tuesday addresses 172 bugs

🔒 Microsoft’s October Patch Tuesday delivers updates for 172 vulnerabilities, including six classed as zero-days. Three of those zero-days are being actively exploited, affecting the Windows Remote Access Connection Manager (CVE-2025-59230), an Agere modem kernel driver, and a secure-boot bypass in IGEL OS (CVE-2025-47827). Microsoft has removed the legacy Agere driver rather than patch it, citing risks in modifying unsupported code. This release also marks the final free Patch Tuesday for Windows 10; continued updates will require the Extended Security Updates (ESU) program.

October 2025 Patch Tuesday: Critical WSUS and Modem Fixes

🔒 Microsoft’s October Patch Tuesday addresses 167 vulnerabilities, including seven rated critical that require immediate CISO attention. Notable fixes include a 9.8 RCE in Windows Server Update Service (WSUS) (CVE-2025-59287) and two Office RCEs exploitable via the Preview Pane. Two legacy Agere modem driver flaws include an in-the-wild zero day and a prior public disclosure, prompting Microsoft to remove ltmdm64.sys from Windows. Administrators should prioritize internet-facing services, kernel-mode drivers, and review WSUS exposure and patch management architecture.

Patch Tuesday Oct 2025: 172 Flaws, End of Windows 10

⚠️ Microsoft’s October 2025 updates close 172 security holes and include at least two actively exploited zero‑days. The company removed a decades-old Agere modem driver to mitigate CVE-2025-24990 and patched an elevation-of-privilege zero-day in RasMan (CVE-2025-59230). A critical unauthenticated RCE in WSUS (CVE-2025-59287) carries a 9.8 threat score and should be prioritized. This release also marks the end of security updates for Windows 10, prompting ESU enrollment or migration options.