Vulnerability · Published Apr 23, 2026 · Assigned by microsoft
CVE-2026-33819Microsoft Bing Remote Code Execution Vulnerability
Critical 10.0
In plain English
A critical-severity unsafe deserialization in Microsoft Bing from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities).
Severity (CVSS 3.1)10.0Critical
Exploit odds (30 days)0.8%top 42.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Deserialization of untrusted data in Microsoft Bing allows an unauthorized attacker to execute code over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Bing | - |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Microsoft Bing Remote Code Execution Vulnerability vendor-advisory, patch