Microsoft: >> Windows Security Vulnerabilities
An off-by-one error (CWE-193) in the ConsumeUnit16Array and ConsumeUnit64Array functions in Velocidex Velociraptor before version 0.76.5 on Windows and Linux allows a local attacker to cause a Denial of Service (DoS) via a process crash by providing a specially crafted .evtx file to the parse_evtx VQL plugin.
CVSS Score
4.4
EPSS Score
0.001
Published
2026-05-06
CVE-2026-40951 is a memory corruption vulnerability on Secure Access
Windows clients prior to 14.50. Attackers with local control of the
Windows client can send malformed data to an API and trigger a denial of
service.
CVSS Score
6.8
EPSS Score
0.001
Published
2026-04-30
CVE-2026-40949 is a buffer overflow vulnerability in the Secure Access
Windows client prior to 14.50. Attackers with local control of the
Windows client can use it to trigger a denial of service.
CVSS Score
6.8
EPSS Score
0.001
Published
2026-04-30
CVE-2026-33451 is an arbitrary read/write vulnerability in the Secure
Access Windows client prior to 14.50. Attackers with local control of
the Windows client can send malformed data to an API and elevate their
level of privilege to system.
CVSS Score
8.5
EPSS Score
0.001
Published
2026-04-30
CVE-2026-33452 is a buffer overflow vulnerability in the Secure Access
Windows client prior to 14.50. Attackers with local control of the
Windows client can use it to ‘blue screen’ the system.
CVSS Score
5.9
EPSS Score
0.001
Published
2026-04-30
Ollama for Windows contains a Remote Code Execution vulnerability in its update mechanism due to improper handling of attacker‑controlled HTTP response headers. When downloading updates, the application constructs local file paths using values derived from HTTP headers without validation. These values are passed directly to filepath.Join, allowing path traversal sequences (../) to be resolved and enabling files to be written outside the intended update staging directory.
An attacker who can influence update responses can exploit this flaw to write arbitrary executables to attacker‑chosen locations accessible to the current user, including the Windows Startup directory. This allows execution of arbitrary executables.
Critically, when chained with CVE‑2026‑42248 (Missing Signature Verification for Updates), an attacker can deliver malicious payloads that are written to sensitive locations and executed automatically. Because Ollama for Windows performs silent automatic updates and executes staged binaries without user interaction, this results in automatic and persistent code execution without user awareness.
Maintainers of this project were notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Versions from 0.12.10 to 0.17.5 were tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.
CVSS Score
7.7
EPSS Score
0.006
Published
2026-04-29
Spring MVC and WebFlux applications are vulnerable to Denial of Service attacks when resolving static resources.
More precisely, an application can be vulnerable when all the following are true:
* the application is using Spring MVC or Spring WebFlux
* the application is serving static resources from the file system
* the application is running on a Windows platform
When all the conditions above are met, the attacker can send malicious requests that are slow to resolve and that can keep HTTP connections in use. This can cause a Denial of Service on the application.
CVSS Score
5.3
EPSS Score
0.003
Published
2026-04-29
Ollama for Windows does not perform integrity or authenticity verification of downloaded update executables. Unlike other platforms, the Windows implementation of the update verification routine unconditionally returns success so no digital signature or trust validation is performed before staging or executing update payloads, enabling attacker‑supplied executables to be accepted and later executed by the application.
Critically, Ollama for Windows performs silent automatic updates, so the malicious payload may be installed automatically without user awareness.
Maintainers of this project were notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Versions from 0.12.10 to 0.17.5 were tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.
CVSS Score
7.7
EPSS Score
0.004
Published
2026-04-29
Use after free in Media in Google Chrome prior to 147.0.7727.138 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: Medium)
CVSS Score
8.8
EPSS Score
0.003
Published
2026-04-28
Use after free in Navigation in Google Chrome prior to 147.0.7727.138 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: High)
CVSS Score
8.8
EPSS Score
0.003
Published
2026-04-28