PatchSiren

Microsoft CVE debriefs

These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.

HIGH Microsoft CVE published 2026-09-15

CVE-2026-85893

Microsoft Edge (Chromium-based) vulnerability CVE-2026-85893 allows unauthorized attackers to elevate privileges over a network due to a use-after-free issue. This vulnerability is a high-severity issue that requires immediate attention from defenders to prevent potential privilege escalation attacks. The vulnerability affects Microsoft Edge (Chromium-based) and allows attackers to execute arbitrary code [truncated]

HIGH Microsoft CVE published 2026-09-15

CVE-2026-69486

CVE-2026-69486 is a high-severity vulnerability in Microsoft Edge (Chromium-based) that allows an unauthorized attacker to execute code over a network. The vulnerability is caused by a heap-based buffer overflow. This issue requires immediate attention from network administrators and security teams. The vulnerability's high CVSS score of 8.8 indicates its potential impact. Administrators and users should [truncated]

HIGH Microsoft CVE published 2026-09-14

CVE-2026-85892

A race condition vulnerability in Microsoft Edge (Chromium-based) allows an authorized attacker to elevate privileges locally. The CVE record was published on 2026-09-14T18:20:19.343Z and has not been modified since then. The NVD entry is currently Analyzed. Defenders should assess exposure and prioritize verifying and applying the vendor's remediation for this vulnerability. The vulnerability has a CVSS [truncated]

MEDIUM Microsoft CVE published 2026-09-11

CVE-2026-77490

CVE-2026-77490 is a medium-severity cross-site scripting vulnerability in Microsoft Edge (Chromium-based). An unauthorized attacker could exploit this vulnerability to perform spoofing over a network. The vulnerability is caused by improper neutralization of input during web page generation. Defenders responsible for Chromium-based Microsoft Edge deployments should assess exposure and potential impact. Th [truncated]

HIGH Microsoft CVE published 2026-09-11

CVE-2026-70341

Microsoft Edge (Chromium-based) vulnerability CVE-2026-70341 allows an authorized attacker to execute code over a network due to a use-after-free issue. This high-severity vulnerability has a CVSS score of 8.5 and requires defenders to assess exposure and prioritize patching to prevent potential code execution. The vulnerability affects Microsoft Edge (Chromium-based) deployments, and defenders should ver [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-69646

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-09-08T19:19:04.560Z and has not been modified since then. This CVE record details an improper verification of cryptographic signature in Skype for Business, allowing an unauthorized attacker to perform spoofing over an adjacent network. Defenders responsible for Skype for Business Server deployments sh [truncated]

MEDIUM Microsoft CVE published 2026-09-08

CVE-2026-69642

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-09-08T19:19:03.510Z and has not been modified since then. CVE-2026-69642 is a cross-site scripting vulnerability in Skype for Business Server, allowing unauthorized spoofing over a network. Defenders responsible for Skype for Business Server deployments, especially those with internet-facing interfaces [truncated]

MEDIUM Microsoft CVE published 2026-09-08

CVE-2026-66308

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-09-08T19:18:08.450Z and has not been modified since then. This medium-severity vulnerability in Skype for Business Server could allow an authorized attacker to deny service over a network. Defenders should assess exposure and prioritize remediation, particularly for versions 2015, 2019, and 7.0.2046.84 [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-66307

CVE-2026-66307 is an integer underflow vulnerability in Skype for Business that allows an unauthorized attacker to deny service over a network. The vulnerability has a CVSS score of 7.5 and is considered HIGH severity. Microsoft has released a patch for this vulnerability. Affected deployments should assess exposure and apply patches. The vulnerability is an integer underflow (wrap or wraparound) that cou [truncated]

MEDIUM Microsoft CVE published 2026-09-08

CVE-2026-66306

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-09-08T19:18:08.200Z and has not been modified since then. This CVE record details a vulnerability in Skype for Business Server that allows an unauthorized attacker to disclose information over a network through error messages containing sensitive information. The affected versions require verification [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-66305

CVE-2026-66305 debrief based on the supplied source corpus. The vulnerability is a spoofing vulnerability in Skype for Business Server that allows an authorized attacker to perform spoofing over a network due to client-side authentication. Affected versions include Skype for Business Server 2015, 2019, and Subscription Edition. Defenders should prioritize verifying and patching affected installations, esp [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-66304

A server-side request forgery (SSRF) vulnerability exists in Skype for Business, allowing an unauthorized attacker to disclose information over a network. This issue is rated as HIGH with a CVSS score of 7.5. The vulnerability could allow attackers to access sensitive information, potentially leading to further exploitation. Defenders should assess exposure and prioritize patching to mitigate potential ri [truncated]

MEDIUM Microsoft CVE published 2026-09-08

CVE-2026-66303

A null pointer dereference vulnerability in Skype for Business allows an authorized attacker to deny service over a network. This CVE was published on 2026-09-08T19:18:07.820Z and was last modified on 2026-09-16T19:23:02.977Z. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. Skype for Business Server administrators and defenders should assess exposure and prioritize patching and verific [truncated]

CRITICAL Microsoft CVE published 2026-09-08

CVE-2026-66302

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-09-08T19:18:07.690Z and has not been modified since then. This critical vulnerability in Skype for Business Server allows an unauthorized attacker to execute code over a network due to external control of file name or path. Defenders responsible for Skype for Business Server installations, especially t [truncated]

MEDIUM Microsoft CVE published 2026-09-08

CVE-2026-63523

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-09-08T19:18:07.267Z and has not been modified since then. This CVE-2026-63523 is a cross-site scripting vulnerability in Skype for Business Server 2015 CU13 that allows an unauthorized attacker to perform spoofing over a network. Defenders should assess exposure and prioritize verifying exposure of Sky [truncated]

MEDIUM Microsoft CVE published 2026-09-08

CVE-2026-85875

Microsoft Office Excel is vulnerable to an out-of-bounds read, allowing unauthorized attackers to disclose information locally. The CVE record was published on 2026-09-08T18:21:13.807Z. The vulnerability has a CVSS score of 5.5 and a severity of MEDIUM. Defenders should assess exposure and prioritize patching and verification for Excel and Office deployments. The NVD entry is currently Analyzed, but speci [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-84003

CVE-2026-84003 is a high-severity vulnerability in Microsoft Authentication Library (MSAL) for Node.js, allowing authentication bypass via capture-replay attacks. Defenders should assess exposure, prioritize remediation, and verify affected systems. The vulnerability has a CVSS score of 7.4 and is classified as CWE-294. Affected systems and configurations must be verified to ensure proper remediation. Thi [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-84000

Microsoft Graphics Component has a heap-based buffer overflow vulnerability, CVE-2026-84000, allowing local code execution. This high-severity issue affects multiple Windows 10, Windows 11, and Windows Server versions. Defenders and IT administrators must assess exposure and prioritize patching for affected versions, considering the vulnerability's local exploitation and potential impact on Windows system [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83999

CVE-2026-83999 is a high-severity vulnerability in Windows Resilient File System (ReFS) Deduplication Service that allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7 and is classified as HIGH. Microsoft has released a patch for this vulnerability. Affected product deployments should be reviewed for exposure, and patches should be applied immediately. The v [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83998

A heap-based buffer overflow vulnerability exists in the Remote Desktop Client, potentially allowing an unauthorized attacker to execute code over a network. Multiple Windows versions and server releases are affected, including Windows 10, Windows 11, and Windows Server 2016, 2019, 2022, and 2025. This vulnerability has a CVSS score of 8.8 and is considered high-severity. Defenders should assess their exp [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83997

A use-after-free vulnerability in Windows Message Queuing allows an unauthorized attacker to execute code over a network. The CVE record was published on 2026-09-08T18:21:10.530Z and has not been modified since then. The NVD entry is currently Analyzed. This vulnerability affects multiple Windows versions, including Windows 10, Windows 11, Windows Server 2022, and Windows Server 2025. Microsoft has provid [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83990

A stack-based buffer overflow vulnerability exists in the Microsoft Graphics Component, potentially allowing an authorized attacker to elevate privileges locally. The CVE record was published on 2026-09-08T18:21:09.687Z and has not been modified since then. The NVD entry is currently Analyzed. System administrators and security teams should assess exposure and apply patches or updates as necessary. The vu [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83988

CVE-2026-83988 is a high-severity vulnerability in the Windows Biometric Service that allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH. Microsoft has released a patch for this vulnerability, and defenders should prioritize patching to prevent potential attacks. The vulnerability is a heap-based buffer overflow in the Windows B [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83987

A heap-based buffer overflow vulnerability exists in the Windows Biometric Service, allowing an authorized attacker to elevate privileges locally. This CVE was published on 2026-09-08T18:21:09.180Z and was last modified on 2026-09-12T04:16:42.333Z. The NVD entry is currently Analyzed. The vulnerability has a CVSS score of 7.8, indicating high severity. Defenders responsible for Windows systems, particular [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83985

A heap-based buffer overflow vulnerability exists in the Windows Biometric Service, allowing an authorized attacker to elevate privileges locally. This CVE was published on 2026-09-08T18:21:08.840Z and was last modified on 2026-09-12T04:16:41.767Z. The vulnerability is classified as HIGH severity with a CVSS score of 7.8. Defenders responsible for Windows systems with exposed biometric services should ass [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83983

CVE-2026-83983 is a high-severity vulnerability in the Windows Biometric Service that allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH. Microsoft has released a patch for this vulnerability, and defenders should prioritize patching to prevent potential attacks. The vulnerability is a heap-based buffer overflow in the Windows B [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83982

A heap-based buffer overflow vulnerability exists in the Windows Biometric Service, allowing an authorized attacker to elevate privileges locally. This CVE was published on 2026-09-08T18:21:08.490Z and was last modified on 2026-09-12T04:16:41.330Z. The NVD entry is currently Analyzed. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. Defenders responsible for Windows systems, p [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83981

A heap-based buffer overflow vulnerability exists in the Windows Biometric Service, allowing an authorized attacker to elevate privileges locally. This CVE was published on 2026-09-08T18:21:08.323Z and was last modified on 2026-09-12T04:16:41.143Z. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. Defenders responsible for Windows systems with exposed biometric services should [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83980

CVE-2026-83980 is a high-severity heap-based buffer overflow vulnerability in the Windows Biometric Service, allowing authorized attackers to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is considered HIGH severity. Microsoft has released a patch for this vulnerability. System administrators should assess exposure and apply patches immediately, focusing on Windows Biometric Se [truncated]

HIGH Microsoft CVE published 2026-09-08

CVE-2026-83978

A heap-based buffer overflow vulnerability exists in the Windows Biometric Service, allowing an authorized attacker to elevate privileges locally. This CVE was published on 2026-09-08T18:21:07.833Z and was last modified on 2026-09-12T04:16:40.780Z. The vulnerability has a high CVSS score of 7.8, indicating significant risk. Defenders and administrators responsible for Windows systems, particularly those u [truncated]