CVE-2026-45659
Microsoft SharePoint Remote Code Execution Vulnerability
Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
INFO
Published Date :
May 22, 2026, 11:16 p.m.
Last Modified :
May 27, 2026, 6:32 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-45659
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | f38d906d-7342-40ea-92c1-6c4a2c6478c8 | ||||
| CVSS 3.1 | HIGH | [email protected] |
Public PoC/Exploit Available at Github
CVE-2026-45659 has a 4 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45659.
| URL | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45659 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45659 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45659
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
None
None
Python
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45659 vulnerability anywhere in the article.
-
The Hacker News
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Chrome V8 Zero-Day CVE-2026-11645 Exploited in the Wild - Patch Now
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TheCyberThrone
TheCyberThrone CyberSecurity Newsletter Top 5 Articles – May 2026
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Cisco Catalyst SD-WAN Manager CVE-2026-20245 Flaw Actively Exploited – No Patch Available
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Cisco Patches CVE-2026-20230 in Unified CM as Exploit Code Goes Public
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CISA Adds Exploited Magento RCE Flaw CVE-2026-45247 to KEV Catalog
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Microsoft 365 Android Apps Let Any App Steal Account Tokens via Leftover Debug Flag
A development flag left switched on in production builds of several Microsoft 365 Android apps disabled the check that limits account-token sharing to trusted Microsoft apps. Any other app on the same ... Read more
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Autonomous AI Tool Finds 2-Year-Old RCE Flaw in Redis (CVE-2026-23479)
Redis has patched a use-after-free in its blocking-client code that lets an authenticated user run arbitrary OS commands on the machine hosting the database. The flaw was found by an autonomous AI t ... Read more
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Unpatched Windows Search URI Vulnerability Lets Attackers Steal NTLMv2 Hashes
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TheCyberThrone
CVE-2026-0257 — Palo Alto Networks PAN-OS Auth Bypass
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TheCyberThrone
Google Chrome 148 Security Update
May 29, 2026OverviewGoogle has pushed a major Chrome Stable update fixing 151 security flaws, including 22 critical vulnerabilities affecting core graphics, networking, media, and UI components across ... Read more
The following table lists the changes that have been made to the
CVE-2026-45659 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 27, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:* *cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:* *cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:* versions up to (excluding) 16.0.19725.20280 Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45659 Types: Vendor Advisory -
New CVE Received by [email protected]
May. 22, 2026
Action Type Old Value New Value Added Description Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-502 Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45659