Is CVE-2026-33819 actively exploited?

CVE-2026-33819 has no public evidence of in-the-wild exploitation as of 2026-04-23.

What is the CVSS score for CVE-2026-33819?

CVE-2026-33819 has a CVSS score of 10 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Patch guidance is available from Microsoft security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-33819.

1 product: Microsoft Refer to Description.

Deserialization of untrusted data in Microsoft Bing allows an unauthorized attacker to execute code over a network.

Primary Vendor: MICROSOFT
Published: 4/23/2026
Last Modified: 4/23/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.