CVE-2023-21529
Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability
CVSS
8.8
Alto
EPSS
59.3%
p99
KEV
SÍ
13 abr 2026
Exploit Today
80
0-100
Publicado: 14 feb 2023 · Última mod.: 19 ago 2026 · CWE-502
59.3%EPSS · 30 días62.1%
2026-09-172026-10-15
Producto
Microsoft / Exchange Server
Vulnerabilidad
Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability
Añadido a KEV
13 abr 2026
Remediar antes de
27 abr 2026
Uso conocido en ransomware
Sí
Descripción resumida
Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.
Acción requerida
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notas
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529 ; https://nvd.nist.gov/vuln/detail/CVE-2023-21529
Microsoft Exchange Server Remote Code Execution Vulnerability
- msrc.microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529
- msrc.microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21529
- www.microsoft.comhttps://www.microsoft.com/en-us/security/blog/2026/04/06/storm-1175-focuses-gaze-on-vulnerable-web-facing-assets-in-high-tempo-medusa-ransomware-operations/
CVECVSSEPSSKEVRExplotTítuloVis.
CVE-2026-64610——
———Deserialization of Untrusted Data vulnerability in Apache Kylin. Unsafe Java deserialization could happen from a broken external cache service.
This issue affects Apache Kylin: from 4 through 5.0.4.
Users are recommended to upgrade to version 5.0.5, which fixes the issue.1hCVE-2026-972968.1 ALT—
———Deserialization of Untrusted Data vulnerability in Rocketgenius, Inc Gravity Forms gravityforms allows Object Injection.This issue affects Gravity Forms: from n/a before 3.1.1.7hCVE-2026-1047309.8 CRÍ—
———The Sunshine Photo Cart – Client Photo Gallery & Photo Proofing for Photographers plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.7.4 via deserialization of untrusted input . This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. If a POP chain is present via an additional plugin or theme installed on the target system, the attacker can store the malicious payload unauthenticated via the public favorites page and trigger deserialization by viewing any image in a non-viewable or private gallery.7hCVE-2026-1049328.0 ALT—
———The Search Regex plugin for WordPress is vulnerable to PHP Object Injection in version 3.5 via deserialization of untrusted input in the replace_all function. This allows authenticated attackers, with subscriber-level access and above, to inject a PHP Object. The additional presence of a POP chain allows attackers to execute code.8hCVE-2026-759418.0 ALT—
———A potential vulnerability was reported in the Lenovo Legion Zone application, distributed exclusively in the Chinese market, that could allow an attacker on the same logical network to execute arbitrary code.14hCVE-2026-47218——
——0runwasi facilitates running Wasm and WASI workloads managed by containerd. Prior to 0.6.1, containerd-shim-wasmtime-v1 can treat Wasmtime precompiled bytes supplied directly in an OCI image layer as a trusted artifact from the precompile-cache path and deserialize them as native code. An attacker who causes a victim to run a crafted image can bypass WebAssembly validation and execute native code in the shim zygote process, gaining the filesystem, environment, credentials, networking, and Linux syscall access available to the workload container. Downstream shims built with runwasi's containerd-shim-wasm precompile-cache API are also affected if they implement Compiler and trust executable precompiled artifacts from OCI image layers; the 0.6.1 boundary applies specifically to containerd-shim-wasmtime and does not independently certify downstream product releases. The flaw escapes the WASI sandbox to the workload container boundary, but it does not by itself bypass container isolation or provide direct host code execution. This issue is fixed in version 0.6.1.18h