{"id":1915,"date":"2026-08-12T07:24:26","date_gmt":"2026-08-12T00:24:26","guid":{"rendered":"https:\/\/vncybers.vn\/canh-bao-microsoft-va-398-loi-zero-day-windows-driver\/"},"modified":"2026-08-12T07:24:26","modified_gmt":"2026-08-12T00:24:26","slug":"microsoft-patches-398-flaws-exploited-windows-driver-zero-day","status":"publish","type":"post","link":"https:\/\/vncybers.vn\/en\/canh-bao-microsoft-va-398-loi-zero-day-windows-driver\/","title":{"rendered":"Microsoft patches 398 flaws, including an exploited Windows driver zero-day"},"content":{"rendered":"

Microsoft has released its August 2026 security update to address 398 vulnerabilities across multiple products, including a Windows driver flaw that has already been exploited in the wild. The most notable issue is CVE-2026-68820, a use-after-free<\/em> in the Windows Ancillary Function Driver for WinSock that could allow an attacker with local access to escalate privileges to SYSTEM.<\/p>\n

The Hacker News said the vulnerability is located in the core driver component that handles Windows network socket operations. According to data from the Microsoft Security Response Center, CVE-2026-68820 has a CVSS score of 7.0, is rated Important, has an \u201cExploitation Detected\u201d status, and requires no user interaction if the attacker can run a specially crafted application on the target system.<\/p>\n

\"Laptop<\/p>\n

Why CVE-2026-68820 matters<\/h2>\n

CVE-2026-68820 is not a remote code execution flaw reachable directly over the Internet, but its risk lies in what happens after an initial compromise. A hijacked user account, a malicious file that has already executed, or a local foothold can become far more serious if an attacker uses this flaw to obtain SYSTEM privileges.<\/p>\n

Microsoft describes the issue as use-after-free<\/em> and says successful exploitation requires the attacker to win a race condition. That raises the attack complexity, but the exploited status shows that motivated threat groups can still turn a difficult technical condition into a practical tool.<\/p>\n

More than one zero-day<\/h2>\n

This month\u2019s update also includes many high-severity issues across Windows components, Chromium-based Microsoft Edge, and related services. The Hacker News noted that Microsoft also fixed four unauthenticated remote code execution vulnerabilities with CVSS scores of 9.8, the type of flaws that usually deserve priority in enterprise environments because they can create a direct attack surface.<\/p>\n

With 398 flaws in scope, the August 2026 patch release should not be treated as a routine update bundle. It is a signal that operations teams need to revisit patch management processes, especially for Windows workstations, servers with Internet-exposed services, and systems that require elevated privileges.<\/p>\n

Recommendations for Users and Organizations<\/h2>\n

Individual users should enable Windows Update, install patches promptly, and restart devices after updating. Organizations should prioritize testing and deploying patches to high-risk systems, including administrator devices, jump hosts, workstations that frequently access email or attachments, and systems that hold sensitive data.<\/p>\n

Alongside patching, security teams should watch for unusual privilege escalation, unfamiliar processes running as SYSTEM, and attack chains that begin from ordinary user accounts. For CVE-2026-68820, effective defense is not only about applying the patch, but also about reducing the chance that an attacker can gain an initial local foothold.<\/p>\n

Cybersecurity lesson<\/h2>\n

Privilege escalation zero-days often draw less attention than remote code execution flaws, but they play a decisive role in many intrusion campaigns. When combined with phishing, downloaded malware, or edge application exploitation, this type of flaw can help attackers move from limited access to deeper control of a system.<\/p>\n

For enterprises, patch priority should be based on real-world exploitation, the level of privilege an attacker can reach, and where the affected asset sits in the network. CVE-2026-68820 is a reminder that Windows patch management remains a foundational defense layer, but it must be paired with endpoint monitoring, privilege separation, and application control.<\/p>\n

VNCyberS<\/strong> compiled by VNCyberS from The Hacker News and Microsoft Security Response Center<\/em><\/p>","protected":false},"excerpt":{"rendered":"

Microsoft \u0111\u00e3 ph\u00e1t h\u00e0nh b\u1ea3n v\u00e1 b\u1ea3o m\u1eadt th\u00e1ng 8\/2026 \u0111\u1ec3 x\u1eed l\u00fd 398 l\u1ed7 h\u1ed5ng tr\u00ean nhi\u1ec1u s\u1ea3n ph\u1ea9m, trong \u0111\u00f3 c\u00f3 m\u1ed9t l\u1ed7 h\u1ed5ng Windows driver \u0111\u00e3 b\u1ecb khai th\u00e1c trong th\u1ef1c t\u1ebf. \u0110i\u1ec3m \u0111\u00e1ng ch\u00fa \u00fd nh\u1ea5t l\u00e0 CVE-2026-68820, m\u1ed9t l\u1ed7i use-after-free trong Windows Ancillary Function Driver for WinSock c\u00f3 th\u1ec3 cho […]<\/p>\n","protected":false},"author":2,"featured_media":1913,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[611,614,610,617,615,153,114,613,616,612],"class_list":["post-1915","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc","tag-cve-2026-68820","tag-elevation-of-privilege","tag-microsoft-patch-tuesday","tag-msrc","tag-system-privileges","tag-the-hacker-news","tag-vncybers","tag-windows-ancillary-function-driver-for-winsock","tag-windows-update","tag-windows-zero-day"],"_links":{"self":[{"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/posts\/1915","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/comments?post=1915"}],"version-history":[{"count":0,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/posts\/1915\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/media\/1913"}],"wp:attachment":[{"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/media?parent=1915"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/categories?post=1915"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/tags?post=1915"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}