CVSS: 7.8EPSS: 0%CPEs: 9EXPL: 0CVE-2021-26889 – Windows Update Stack Elevation of Privilege Vulnerability
https://notcve.org/view.php?id=CVE-2021-26889
Windows Update Stack Elevation of Privilege Vulnerability Una Vulnerabilidad de Elevación de Privilegios de la Pila de Windows Update This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within Windows Setup. By creating a directory junction, an attacker can abuse Windows Setup to create a file in an arbitrary location. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of SYSTEM. • https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26889 https://www.zerodayinitiative.com/advisories/ZDI-21-328 • CWE-59: Improper Link Resolution Before File Access ('Link Following') •
CVSS: 7.8EPSS: 0%CPEs: 19EXPL: 0CVE-2021-26887 – Microsoft Windows Folder Redirection Elevation of Privilege Vulnerability
https://notcve.org/view.php?id=CVE-2021-26887
<p>An elevation of privilege vulnerability exists in Microsoft Windows when Folder redirection has been enabled via Group Policy. When folder redirection file server is co-located with Terminal server, an attacker who successfully exploited the vulnerability would be able to begin redirecting another user's personal data to a created folder.</p> <p>To exploit the vulnerability, an attacker can create a new folder under the Folder Redirection root path and create a junction on a newly created User folder. When the new user logs in, Folder Redirection would start redirecting to the folder and copying personal data.</p> <p>This elevation of privilege vulnerability can only be addressed by reconfiguring Folder Redirection with Offline files and restricting permissions, and NOT via a security update for affected Windows Servers. • https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26887 • CWE-59: Improper Link Resolution Before File Access ('Link Following') •
CVSS: 6.1EPSS: 0%CPEs: 16EXPL: 0CVE-2021-26886 – User Profile Service Denial of Service Vulnerability
https://notcve.org/view.php?id=CVE-2021-26886
User Profile Service Denial of Service Vulnerability Una Vulnerabilidad de Denegación de Servicio del User Profile Service This vulnerability allows local attackers to create a denial-of-service condition on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the User Profile Service. By creating a junction, an attacker can abuse the service to overwrite the contents of a chosen file. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. • https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26886 https://www.zerodayinitiative.com/advisories/ZDI-21-327 •
CVSS: 5.5EPSS: 0%CPEs: 16EXPL: 0CVE-2021-26884 – Windows Media Photo Codec Information Disclosure Vulnerability
https://notcve.org/view.php?id=CVE-2021-26884
Windows Media Photo Codec Information Disclosure Vulnerability Una Vulnerabilidad de Divulgación de Información de Photo Codec de Windows Media • https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26884 •
CVSS: 7.8EPSS: 0%CPEs: 19EXPL: 1CVE-2021-26882 – Remote Access API Elevation of Privilege Vulnerability
https://notcve.org/view.php?id=CVE-2021-26882
Remote Access API Elevation of Privilege Vulnerability Una Vulnerabilidad de Elevación de Privilegios de la API Remote Access • https://github.com/taiji-xo/CVE-2021-26882 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26882 •