CVE-2026-33819: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft Bing
Deserialization of untrusted data in Microsoft Bing allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-33819) in Microsoft Bing is caused by improper handling of untrusted serialized data, classified under CWE-502. It allows remote code execution by an attacker over the network without requiring privileges or user interaction. The vulnerability has been assigned a CVSS v3.1 base score of 10.0, reflecting its critical nature and the potential for complete system compromise. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code remotely on affected Microsoft Bing systems, leading to full compromise of confidentiality, integrity, and availability. This could result in unauthorized control over the affected service or system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the provided patch as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33819 for detailed remediation instructions.
CVE-2026-33819: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft Bing
Description
Deserialization of untrusted data in Microsoft Bing allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 10.0critical
Affected software
Microsoft
Microsoft Bing
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-33819) in Microsoft Bing is caused by improper handling of untrusted serialized data, classified under CWE-502. It allows remote code execution by an attacker over the network without requiring privileges or user interaction. The vulnerability has been assigned a CVSS v3.1 base score of 10.0, reflecting its critical nature and the potential for complete system compromise. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code remotely on affected Microsoft Bing systems, leading to full compromise of confidentiality, integrity, and availability. This could result in unauthorized control over the affected service or system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the provided patch as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33819 for detailed remediation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-03-24T00:52:01.351Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33819","vendor":"Microsoft"}]
Threat ID: 69ea97db87115cfb68681bb6
Added to database: 04/23/2026, 22:06:19 UTC
Last enriched: 08/15/2026, 14:11:35 UTC
Last updated: 09/14/2026, 22:01:33 UTC
Views: 375
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