Zero-Day Security News

Zero-day vulnerabilities being actively exploited before a patch exists, and the fixes that follow.

A zero-day is a vulnerability under active exploitation before the vendor has shipped, or even discovered, a fix, leaving defenders with nothing to patch against yet. Disclosures and in-the-wild exploitation show up here, along with the emergency patches that usually follow. These are the highest-urgency items in the feed: attackers already have working exploits by the time most zero-days go public.

Recent Zero-Day items

New N-able "4EverAble2Shell" zero-day exploited hours after PoC released Hackers are actively exploiting a newly disclosed N-able N-central zero-day vulnerability dubbed "4EverAble2Shell" to compromis...
@bleepingcomputer · Nov 12, 2026
New N-able "4EverAble2Shell" zero-day exploited hours after PoC released https://ift.tt/V6xNXPb
@ctinow · Nov 12, 2026
New SignDrop Zero-Day Exploit Turns Windows CLFS Security Feature Into SYSTEM Access https://ift.tt/4vHuqE6
@ctinow · Nov 12, 2026
prepared statements prevents SQLi. But it also helped me to exploit a 22 years old PostgreSQL 0-day RCE (CVE-2026-6460) https://mehmetince.net/part-3-6-how-i-ended-up-turning-a-22-year-old-postgresql-...
@secharvester · Nov 12, 2026
NEW WINDOWS ZERO-DAY EXPLOIT! A security feature designed to stop attacks can be abused to gain SYSTEM privileges. Dubbed SignDrop, the exploit targets Windows CLFS using Microsoft Defender. The code...
@thehackernews · Nov 12, 2026
New Windows SignDrop zero-day gives hackers SYSTEM privileges Security researcher Abdelhamid Naceri (also known as Nightmare Eclipse) has released a new Windows zero-day exploit that can let attackers...
@bleepingcomputer · Nov 12, 2026
New Windows SignDrop zero-day gives hackers SYSTEM privileges https://ift.tt/Q6SZlRF
@ctinow · Nov 12, 2026
New Windows SignDrop Zero-Day Exploit Allows Attackers to Gain SYSTEM Privileges https://gbhackers.com/new-windows-signdrop-zero-day/
@PentestingNews · Nov 12, 2026
Windows SignDrop Zero-Day Bypasses CLFS Kernel Driver for SYSTEM Access https://homeland411.com/windows-signdrop-zero-day-clfs-kernel-privilege-escalation/
@secharvester · Nov 12, 2026
Microsoft patches actively exploited Outlook zero-day https://www.bleepingcomputer.com/news/microsoft/microsoft-november-2026-patch-tuesday-fixes-1-235-flaws-outlook-zero-day/
@secharvester · Nov 11, 2026
N-able Warns of Critical N-central Zero-Day Vulnerability Actively Exploited by Hackers https://gbhackers.com/n-able-warns-of-critical-n-central-zero-day-vulnerability/
@PentestingNews · Nov 11, 2026
N-able releases security hotfixes for zero-day vulnerabilities https://ift.tt/ZcYqRe1
@ctinow · Nov 11, 2026
N-able releases security hotfixes for zero-day vulnerabilities N-able released hotfixes to address zero-day bugs affecting its N-central remote monitoring and management (RMM) platform, which were pub...
@bleepingcomputer · Nov 11, 2026
CISA flags Cisco BroadWorks flaw as actively exploited in attacks The US Cybersecurity and Infrastructure Security Agency (CISA) warned on Tuesday that hackers are now exploiting a high-severity Cisco...
@bleepingcomputer · Nov 11, 2026
CISA flags Cisco BroadWorks flaw as actively exploited in attacks https://ift.tt/1sMhQu8
@ctinow · Nov 11, 2026
𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 𝗢𝘂𝘁𝗹𝗼𝗼𝗸 𝗩𝘂𝗹𝗻𝗲𝗿𝗮𝗯𝗶𝗹𝗶𝘁𝘆 (𝗖𝗩𝗘-𝟮𝟬𝟮𝟲-𝟭𝟮𝟰𝟭𝟵𝟰) 𝗔𝗰𝘁𝗶𝘃𝗲𝗹𝘆 𝗘𝘅𝗽𝗹𝗼𝗶𝘁𝗲𝗱 𝘁𝗼 𝗦𝘁𝗲𝗮𝗹 𝗡𝗧𝗟𝗠𝘃𝟮 𝗔𝘂𝘁𝗵𝗲𝗻𝘁𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗛𝗮𝘀𝗵𝗲𝘀 Microsoft disclosed an actively exploited Outlook vulnerability (CVE-2026-124194, CVSS 6.5) t...
@hackmanac_cybernews · Nov 11, 2026
Chrome Fixes Exploited XML Flaw: Relaunch to Apply the Update Google has released a Chrome update for an XML flaw that already has an exploit in the wild. The fix is in the November 9 desktop release,...
@topcybersecurity · Nov 11, 2026
Microsoft November 2026 Patch Tuesday Addresses Critical RCE Flaws and Outlook Zero-Day Attacks https://gbhackers.com/microsoft-november-2026-patch-tuesday/
@PentestingNews · Nov 11, 2026
Microsoft Outlook Zero-Day Vulnerability Actively Exploited to Steal NTLM Authentication Hashes https://gbhackers.com/microsoft-outlook-zero-day-vulnerability/
@PentestingNews · Nov 11, 2026
Cisco BroadWorks and Openwave Flaws Actively Exploited Despite Available Patches https://ift.tt/LNotPTv
@ctinow · Nov 11, 2026
Google patches Chrome zero-day already exploited in attacks https://www.bleepingcomputer.com/news/security/google-patches-eighth-chrome-zero-day-exploited-in-attacks-this-year/
@secharvester · Nov 10, 2026
Exploited Outlook Zero-Day Among 1,094 Flaws Patched by Microsoft https://ift.tt/TwhfkUS
@ctinow · Nov 10, 2026
Microsoft November 2026 Patch Tuesday fixes 1,235 flaws, Outlook zero-day https://ift.tt/PLSMbvz
@ctinow · Nov 10, 2026
Microsoft November 2026 Patch Tuesday fixes 1,235 flaws, Outlook zero-day Today is Microsoft's November 2026 Patch Tuesday, with security updates addressing a record-breaking 1,235 flaws, including on...
@bleepingcomputer · Nov 10, 2026
Critical Xen Orchestra auth bypass flaw exploited to hijack VM servers A critical authentication bypass vulnerability in Xen Orchestra is being actively exploited in attacks that could grant administr...
@bleepingcomputer · Nov 10, 2026
Blind Eagle is targeting Latin American organizations with fake court notices that deliver an AsyncRAT-based trojan. The campaign uses weaponized SVG files, HTML smuggling, and in-memory execution to...
@thehackernews · Nov 10, 2026
Google fixes the eighth actively exploited Chrome zero-day of 2026 https://securityaffairs.com/202772/breaking-news/google-fixes-the-eighth-actively-exploited-chrome-zero-day-of-2026.html
@PentestingNews · Nov 10, 2026
Google fixes the eighth actively exploited Chrome zero-day of 2026 https://ift.tt/4safuHN
@ctinow · Nov 10, 2026
Google patches eighth Chrome zero-day exploited in attacks this year Google has released emergency security updates to patch a new Chrome vulnerability exploited in zero-day attacks, the eighth such f...
@bleepingcomputer · Nov 10, 2026
Google patches eighth Chrome zero-day exploited in attacks this year https://ift.tt/n5ciPvk
@ctinow · Nov 10, 2026

Other topics

CVE
Recent CVE identifiers and vulnerability disclosures aggregated from security feeds: new IDs, published advisories, and the vendors and products they affect.
Ransomware
Ransomware attacks, extortion group activity, victim disclosures and decryptor releases.
Phishing
Phishing campaigns, credential-harvesting kits, and social-engineering techniques used to compromise users and organizations.
Data Breach
Confirmed and reported data breaches: what was exposed, which organizations were affected, and how the incident came to light.
Exploit
Public exploit code, proof-of-concept releases, and technical exploitation write-ups for known vulnerabilities.
Patch
Vendor patches, security updates and fix releases for previously disclosed vulnerabilities.