Microsoft Patch Tuesday for August 2026 — Snort rules and prominent vulnerabilities
Microsoft has released its monthly security update for August 2026, which includes 421 vulnerabilities affecting a range of products, including 62 that Microsoft marked as "critical." Microsoft notes that 1 of the vulnerabilities disclosed this month have been exploited in the wild CVE-2026-68820 is an elevation of privilege vulnerability affecting Windows Ancillary Function Driver for WinSock. A Use After Free vulnerability could allow an authorized attacker to elevate privileges locally. This vulnerability has a CVSS base score of 7.0. Out of 62 "critical" vulnerabilities, 40 are remote code execution (RCE) vulnerabilities. Microsoft considers exploitation of the following vulnerabilities more likely. CVE-2026-62893 is a remote code execution vulnerability affecting Windows Deployment Services TFTP Server. A Use After Free could allow an unauthorized attacker to execute code over a network. This vulnerability has a CVSS base score of 9.8. CVE-2026-65665 is a remote code execution vulnerability affecting Microsoft SharePoint Server. Deserialization of Untrusted Data could allow an authorized attacker to execute code over a network. This vulnerability has a CVSS base score of 8.8. CVE-2026-62823 is a remote code execution vulnerability affecting Windows DHCP Server. A Heap-based Buffer Overflow could allow an unauthorized attacker to execute code over an adjacent network. This vulnerability has a CVSS base score of 8.8. Microsoft considers exploitation of the following vulnerabilities less likely. CVE-2026-62830 is an elevation of privilege vulnerability affecting Azure SRE Agent. Missing Authorization could allow an authorized attacker to elevate privileges over a network. This vulnerability has a CVSS base score of 9.9. CVE-2026-50516 is an elevation of privilege vulnerability affecting Microsoft Azure Kubernetes Service. Missing Authentication for Critical Function could allow an unauthorized attacker to elevate privileges over a network. This vulnerability has a CVSS base score of 9.4. Three remote code execution vulnerabilities, CVE-2026-68794 , CVE-2026-68816 and CVE-2026-68804 , affect Microsoft Excel and have a CVSS base score of 7.8. An unauthorized attacker could execute code locally. CVE-2026-68794 is a Heap-based Buffer Overflow. CVE-2026-68816 is a Stack-based Buffer Overflow. CVE-2026-68804 involves a Numeric Truncation Error and a Heap-based Buffer Overflow. CVE-2026-62911 is an elevation of privilege vulnerability affecting Microsoft Exchange Server. Authentication Bypass by Capture-replay could allow an authorized attacker to elevate privileges over a network. This vulnerability has a CVSS base score of 8.0. Nine remote code execution vulnerabilities, CVE-2026-63515 , CVE-2026-65657 , CVE-2026-63532 , CVE-2026-64898 , CVE-2026-64903 , CVE-2026-64909 , CVE-2026-64910 , CVE-2026-64911 and CVE-2026-70130 , affect Microsoft Office and could allow an unauthorized attacker to execute code locally. CVE-2026-63515 involves an Out-of-bounds Read and an Integer Underflow (Wrap or Wraparound) and has a CVSS base score of 7.8. CVE-2026-65657 is a Use After Free and has a CVSS base score of 7.8. CVE-2026-63532 involves an Integer Overflow or Wraparound and a Heap-based Buffer Overflow and has a CVSS base score of 7.8. CVE-2026-64898 involves a Heap-based Buffer Overflow and an Integer Overflow or Wraparound and has a CVSS base score of 7.8. CVE-2026-64903 involves an Integer Overflow or Wraparound and a Heap-based Buffer Overflow and has a CVSS base score of 7.8. CVE-2026-64909 involves an Integer Underflow (Wrap or Wraparound), an Out-of-bounds Read and a Heap-based Buffer Overflow and has a CVSS base score of 7.8. CVE-2026-64910 is an Untrusted Pointer Dereference and has a CVSS base score of 7.8. CVE-2026-64911 involves an Integer Overflow or Wraparound and a Heap-based Buffer Overflow and has a CVSS base score of 7.8. CVE-2026-70130 is a Heap-based Buffer Overflow and has a CVSS base score of 8.4. Five remote code exec…
AI Analysis
Technical Summary
The August 2026 Microsoft security update fixes 421 vulnerabilities, including 62 critical ones. CVE-2026-68820 is an elevation of privilege vulnerability in Windows Ancillary Function Driver for WinSock that has been exploited in the wild. Other notable vulnerabilities include remote code execution flaws in Windows Deployment Services TFTP Server (CVE-2026-62893, CVSS 9.8), SharePoint Server (CVE-2026-65665, CVSS 8.8), and DHCP Server (CVE-2026-62823, CVSS 8.8). Elevation of privilege vulnerabilities affect Azure SRE Agent (CVE-2026-62830, CVSS 9.9) and Azure Kubernetes Service (CVE-2026-50516, CVSS 9.4). Multiple remote code execution vulnerabilities affect Microsoft Excel and Office with CVSS scores around 7.8 to 8.4. Microsoft has released official patches for all these vulnerabilities as part of the August 2026 update.
Potential Impact
Successful exploitation of these vulnerabilities could allow attackers to execute code remotely or locally, elevate privileges, or bypass authentication, depending on the specific flaw. The exploited CVE-2026-68820 allows local privilege escalation. High-severity remote code execution vulnerabilities could enable attackers to run arbitrary code on affected systems remotely, potentially leading to full system compromise. Elevation of privilege flaws in Azure services could allow attackers to gain higher privileges over networked resources. The widespread nature and critical severity of many vulnerabilities pose significant risk if unpatched.
Mitigation Recommendations
Microsoft has released official patches for all vulnerabilities disclosed in the August 2026 update, including those exploited in the wild. Organizations should apply the August 2026 security updates promptly to mitigate these risks. No additional vendor advisories indicate alternative mitigations or that no action is required. Patch status is confirmed as official-fix via Microsoft's monthly update.
Microsoft Patch Tuesday for August 2026 — Snort rules and prominent vulnerabilities
Description
Microsoft has released its monthly security update for August 2026, which includes 421 vulnerabilities affecting a range of products, including 62 that Microsoft marked as "critical." Microsoft notes that 1 of the vulnerabilities disclosed this month have been exploited in the wild CVE-2026-68820 is an elevation of privilege vulnerability affecting Windows Ancillary Function Driver for WinSock. A Use After Free vulnerability could allow an authorized attacker to elevate privileges locally. This vulnerability has a CVSS base score of 7.0. Out of 62 "critical" vulnerabilities, 40 are remote code execution (RCE) vulnerabilities. Microsoft considers exploitation of the following vulnerabilities more likely. CVE-2026-62893 is a remote code execution vulnerability affecting Windows Deployment Services TFTP Server. A Use After Free could allow an unauthorized attacker to execute code over a network. This vulnerability has a CVSS base score of 9.8. CVE-2026-65665 is a remote code execution vulnerability affecting Microsoft SharePoint Server. Deserialization of Untrusted Data could allow an authorized attacker to execute code over a network. This vulnerability has a CVSS base score of 8.8. CVE-2026-62823 is a remote code execution vulnerability affecting Windows DHCP Server. A Heap-based Buffer Overflow could allow an unauthorized attacker to execute code over an adjacent network. This vulnerability has a CVSS base score of 8.8. Microsoft considers exploitation of the following vulnerabilities less likely. CVE-2026-62830 is an elevation of privilege vulnerability affecting Azure SRE Agent. Missing Authorization could allow an authorized attacker to elevate privileges over a network. This vulnerability has a CVSS base score of 9.9. CVE-2026-50516 is an elevation of privilege vulnerability affecting Microsoft Azure Kubernetes Service. Missing Authentication for Critical Function could allow an unauthorized attacker to elevate privileges over a network. This vulnerability has a CVSS base score of 9.4. Three remote code execution vulnerabilities, CVE-2026-68794 , CVE-2026-68816 and CVE-2026-68804 , affect Microsoft Excel and have a CVSS base score of 7.8. An unauthorized attacker could execute code locally. CVE-2026-68794 is a Heap-based Buffer Overflow. CVE-2026-68816 is a Stack-based Buffer Overflow. CVE-2026-68804 involves a Numeric Truncation Error and a Heap-based Buffer Overflow. CVE-2026-62911 is an elevation of privilege vulnerability affecting Microsoft Exchange Server. Authentication Bypass by Capture-replay could allow an authorized attacker to elevate privileges over a network. This vulnerability has a CVSS base score of 8.0. Nine remote code execution vulnerabilities, CVE-2026-63515 , CVE-2026-65657 , CVE-2026-63532 , CVE-2026-64898 , CVE-2026-64903 , CVE-2026-64909 , CVE-2026-64910 , CVE-2026-64911 and CVE-2026-70130 , affect Microsoft Office and could allow an unauthorized attacker to execute code locally. CVE-2026-63515 involves an Out-of-bounds Read and an Integer Underflow (Wrap or Wraparound) and has a CVSS base score of 7.8. CVE-2026-65657 is a Use After Free and has a CVSS base score of 7.8. CVE-2026-63532 involves an Integer Overflow or Wraparound and a Heap-based Buffer Overflow and has a CVSS base score of 7.8. CVE-2026-64898 involves a Heap-based Buffer Overflow and an Integer Overflow or Wraparound and has a CVSS base score of 7.8. CVE-2026-64903 involves an Integer Overflow or Wraparound and a Heap-based Buffer Overflow and has a CVSS base score of 7.8. CVE-2026-64909 involves an Integer Underflow (Wrap or Wraparound), an Out-of-bounds Read and a Heap-based Buffer Overflow and has a CVSS base score of 7.8. CVE-2026-64910 is an Untrusted Pointer Dereference and has a CVSS base score of 7.8. CVE-2026-64911 involves an Integer Overflow or Wraparound and a Heap-based Buffer Overflow and has a CVSS base score of 7.8. CVE-2026-70130 is a Heap-based Buffer Overflow and has a CVSS base score of 8.4. Five remote code exec…
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The August 2026 Microsoft security update fixes 421 vulnerabilities, including 62 critical ones. CVE-2026-68820 is an elevation of privilege vulnerability in Windows Ancillary Function Driver for WinSock that has been exploited in the wild. Other notable vulnerabilities include remote code execution flaws in Windows Deployment Services TFTP Server (CVE-2026-62893, CVSS 9.8), SharePoint Server (CVE-2026-65665, CVSS 8.8), and DHCP Server (CVE-2026-62823, CVSS 8.8). Elevation of privilege vulnerabilities affect Azure SRE Agent (CVE-2026-62830, CVSS 9.9) and Azure Kubernetes Service (CVE-2026-50516, CVSS 9.4). Multiple remote code execution vulnerabilities affect Microsoft Excel and Office with CVSS scores around 7.8 to 8.4. Microsoft has released official patches for all these vulnerabilities as part of the August 2026 update.
Potential Impact
Successful exploitation of these vulnerabilities could allow attackers to execute code remotely or locally, elevate privileges, or bypass authentication, depending on the specific flaw. The exploited CVE-2026-68820 allows local privilege escalation. High-severity remote code execution vulnerabilities could enable attackers to run arbitrary code on affected systems remotely, potentially leading to full system compromise. Elevation of privilege flaws in Azure services could allow attackers to gain higher privileges over networked resources. The widespread nature and critical severity of many vulnerabilities pose significant risk if unpatched.
Mitigation Recommendations
Microsoft has released official patches for all vulnerabilities disclosed in the August 2026 update, including those exploited in the wild. Organizations should apply the August 2026 security updates promptly to mitigate these risks. No additional vendor advisories indicate alternative mitigations or that no action is required. Patch status is confirmed as official-fix via Microsoft's monthly update.
Technical Details
- Classification
- {"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
- Article Source
- {"url":"https://blog.talosintelligence.com/microsoft-patch-tuesday-for-august-2026/","fetched":true,"fetchedAt":"2026-08-11T22:38:34.856Z","wordCount":2432}
Threat ID: 6a7ba46abf8831d5398551ff
Added to database: 08/11/2026, 22:38:34 UTC
Last enriched: 08/11/2026, 22:38:43 UTC
Last updated: 09/24/2026, 01:47:44 UTC
Views: 276
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