CVE-2025-49706
Microsoft SharePoint Improper Authentication Vulnerability - [Actively Exploited]
Description
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
INFO
Published Date :
July 8, 2025, 5:15 p.m.
Last Modified :
July 30, 2025, 1 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Microsoft SharePoint contains an improper authentication vulnerability that allows an authorized attacker to perform spoofing over a network. Successfully exploitation could allow an attacker to view sensitive information and make some changes to disclosed information. This vulnerability could be chained with CVE-2025-49704. The update for CVE-2025-53771 includes more robust protections than the update for CVE-2025-49706.
CISA recommends disconnecting public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS). For example, SharePoint Server 2013 and earlier versions are end-of-life and should be discontinued if still in use. For supported versions, please follow the mitigations according to CISA and vendor instructions. Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
CISA Mitigation Instructions: https://www.cisa.gov/news-events/alerts/2025/07/20/microsoft-releases-guidance-exploitation-sharepoint-vulnerability-cve-2025-53770; https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/ ; https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49706 ; https://nvd.nist.gov/vuln/detail/CVE-2025-49706
Affected Products
The following products are affected by CVE-2025-49706
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 | MEDIUM | [email protected] |
Solution
- Apply the relevant security updates provided by Microsoft to address the vulnerability.
- Ensure all SharePoint servers are updated to the latest versions.
Public PoC/Exploit Available at Github
CVE-2025-49706 has a 15 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-2025-49706.
| URL | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49706 | Vendor Advisory |
| https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/ | Press/Media Coverage 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-2025-49706 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-2025-49706
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
CVE-2025-53770 - SharePoint
None
SharePoint 2025 RCE Exploitation GUI
Python Ruby
None
Dockerfile Shell Python
None
PowerShell
Honeypot for CVE-2025-53770 aka ToolShell
Python Shell YARA
A critical zero-auth RCE vulnerability in SharePoint (CVE-2025-53770), now exploited in the wild, building directly on the spoofing flaw CVE-2025-49706.
cve cve-2025-49706 cve-2025-53770 cybersecurity microsoft-sharepoint sharepoint sharepoint-2016 toolshell
None
PowerShell
Comprueba si un servidor SharePoint on-premises es vulnerable a CVE-2025-53770
Python
Scanner for the SharePoint CVE-2025-53770 RCE zero day vulnerability.
cve poc sharepoint cve-2025-53770
Go Dockerfile Makefile
A deep dive into CVE-2025-49706 — the SharePoint spoofing flaw now exploited in the wild for stealthy web shell deployment and privilege escalation.
cve cybersecurity microsoft-sharepoint sharepoint sharepoint-2016 cve-2025-49706 toolshell
CISA Bot is a GitHub bot that automatically monitors the Cybersecurity and Infrastructure Security Agency (CISA) Known Exploited Vulnerabilities (KEV) Catalog. When new vulnerabilities are published in the KEV, the bot creates GitHub issues in this repository with detailed information about each vulnerability.
Python
SecDB - Security Feeds
cve security-feeds vulnerability
📡 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-2025-49706 vulnerability anywhere in the article.
-
security.nl
Microsoft geeft Chinese securitybedrijven minder informatie over kwetsbaarheden
Microsoft geeft Chinese securitybedrijven minder informatie over kwetsbaarheden waarvoor het een aantal dagen later beveiligingsupdates uitbrengt, zo laat het techbedrijf tegenover Bloomberg en Reuter ... Read more
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CybersecurityNews
Qilin Ransomware Leads The Attack Landscape With 70+ Claimed Victims in July
The ransomware threat landscape witnessed a concerning surge in July 2025, with the Qilin ransomware group maintaining its dominant position for the third time in four months. The group successfully c ... Read more
-
Help Net Security
August 2025 Patch Tuesday forecast: Try, try, again
July turned into a surprisingly busy month. It started slowly with a fairly ‘calm’ Patch Tuesday as I forecasted in my last blog. Although there were 130 new CVEs addressed across all the Microsoft re ... Read more
-
The Register
CISA releases malware analysis for Sharepoint Server attack
CISA has published a malware analysis report with compromise indicators and Sigma rules for "ToolShell" attacks targeting specific Microsoft SharePoint Server versions. "Cyber threat actors have chain ... Read more
-
CybersecurityNews
CISA Warns of ‘ToolShell’ Exploits Chain Attacks SharePoint Servers – Discloses IOCs and detection signatures
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) released an urgent analysis in early July 2025, detailing a sophisticated exploit chain targeting on-premises Microsoft SharePoint serv ... Read more
-
security.nl
VS deelt informatie over malware aangetroffen bij SharePoint-aanvallen
Het Amerikaanse cyberagentschap CISA heeft informatie gedeeld over malware die bij recente aanvallen tegen Microsoft SharePoint-servers is aangetroffen. Met de informatie kunnen organisaties kijken of ... Read more
-
Daily CyberSecurity
CISA Warns of “ToolShell”: Critical Exploit Chain Hits SharePoint Servers, Bypasses Authentication
The Cybersecurity and Infrastructure Security Agency (CISA) has released an in-depth Malware Analysis Report warning of a sophisticated exploitation campaign targeting on-premises Microsoft SharePoint ... Read more
-
CybersecurityNews
Chinese Hackers Exploit SharePoint Vulnerabilities to Deploy Toolsets Includes Backdoor, Ransomware and Loaders
A sophisticated Chinese threat actor has been exploiting critical vulnerabilities in Microsoft SharePoint to deploy an advanced malware toolset dubbed “Project AK47,” according to new research publish ... Read more
-
BleepingComputer
The Heat Wasn't Just Outside: Cyber Attacks Spiked in Summer 2025
Summer 2025 wasn't just hot; it was relentless. Ransomware hammered hospitals, retail giants suffered data breaches, insurance firms were hit by phishing, and nation-state actors launched disruptive c ... Read more
-
BleepingComputer
Ransomware gangs join attacks targeting Microsoft SharePoint servers
Ransomware gangs have recently joined ongoing attacks targeting a Microsoft SharePoint vulnerability chain, part of a broader exploitation campaign that has already led to the breach of at least 148 o ... Read more
-
Daily CyberSecurity
Storm-2603: Chinese APT Deploys Warlock & LockBit with AK47C2 Framework
Antivirus Terminator supported arguments when run without parameters | Image: Check Point Check Point Research (CPR) has detailed a previously undocumented Chinese-affiliated threat actor—Storm-2603—l ... Read more
-
CybersecurityNews
Storm-2603 Using Custom Malware That Leverages BYOVD to Tamper with Endpoint Protections
A newly identified threat actor designated Storm-2603 has emerged as a sophisticated adversary in the ransomware landscape, leveraging advanced custom malware to circumvent endpoint security protectio ... Read more
-
The Hacker News
Storm-2603 Deploys DNS-Controlled Backdoor in Warlock and LockBit Ransomware Attacks
Aug 01, 2025Ravie LakshmananThreat Intelligence / Ransomware The threat actor linked to the exploitation of the recently disclosed security flaws in Microsoft SharePoint Server is using a bespoke co ... Read more
-
AttackIQ
Response to CISA Alert: Microsoft Releases Guidance on Exploitation of SharePoint Vulnerabilities
On July 8, 2025, vulnerabilities CVE-2025-49704 (Remote Code Execution) and CVE-2025-49706 (Network Spoofing), affecting on-premises Microsoft SharePoint servers, were officially reported. On the same ... Read more
-
Schneier on Security
Microsoft SharePoint Zero-Day
Chinese hackers are exploiting a high-severity vulnerability in Microsoft SharePoint to steal data worldwide: The vulnerability, tracked as CVE-2025-53770, carries a severity rating of 9.8 out of a po ... Read more
-
CybersecurityNews
New “ToolShell” Exploit Chain Attacking SharePoint Servers to Gain Complete Control
A critical new threat targeting Microsoft SharePoint servers through a sophisticated exploit chain dubbed “ToolShell.” This multi-stage attack combines previously patched vulnerabilities with fresh ze ... Read more
-
The Register
Blame a leak for Microsoft SharePoint attacks, researcher insists
A week after Microsoft told the world that its July software updates didn't fully fix a couple of bugs, which allowed miscreants to take over on-premises SharePoint servers and remotely execute code, ... Read more
-
SentinelOne
The Good, the Bad and the Ugly in Cybersecurity – Week 30
The Good | Authorities Dismantle XSS.is Cybercrime Forum & Release Free Phobos/8Base Decryptor After a 12-year long run, XSS[.]is (formerly DaMaGeLaB) faced major disruptions this week with the arrest ... Read more
-
SentinelOne
The Good, the Bad and the Ugly in Cybersecurity – Week 30
The Good | Authorities Dismantle XSS.is Cybercrime Forum & Release Free Phobos/8Base Decryptor After a 12-year long run, XSS[.]is (formerly DaMaGeLaB) faced major disruptions this week with the arrest ... Read more
-
CybersecurityNews
Hackers Exploiting Sharepoint 0-day Vulnerability to Deploy Warlock Ransomware
Microsoft has issued urgent warnings about active exploitation of critical SharePoint vulnerabilities CVE-2025-53770 and CVE-2025-53771 by multiple threat actors, including the China-based group Storm ... Read more
The following table lists the changes that have been made to the
CVE-2025-49706 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.
-
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
Jul. 30, 2025
Action Type Old Value New Value Changed Required Action CISA recommends disconnecting public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS). For example, SharePoint Server 2013 and earlier versions are end-of-life and should be discontinued if still in use. For supported versions, please follow the mitigations according to CISA and vendor instructions. Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available. Disconnect public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS) to include SharePoint Server 2013 and earlier versions. For supported versions, please follow the mitigations according to CISA (URL listed below in Notes) and vendor instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available. -
Modified Analysis by [email protected]
Jul. 23, 2025
Action Type Old Value New Value Added Reference Type CISA-ADP: https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/ Types: Press/Media Coverage, Vendor Advisory -
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
Jul. 23, 2025
Action Type Old Value New Value Added Date Added 2025-07-22 Added Due Date 2025-07-23 Added Required Action CISA recommends disconnecting public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS). For example, SharePoint Server 2013 and earlier versions are end-of-life and should be discontinued if still in use. For supported versions, please follow the mitigations according to CISA and vendor instructions. Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available. Added Vulnerability Name Microsoft SharePoint Improper Authentication Vulnerability -
CVE Modified by [email protected]
Jul. 22, 2025
Action Type Old Value New Value Changed Description Improper authentication in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network. Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Removed CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 22, 2025
Action Type Old Value New Value Added Reference https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/ -
CVE Modified by [email protected]
Jul. 21, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N Removed CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N -
Initial Analysis by [email protected]
Jul. 16, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:microsoft:sharepoint_enterprise_server:2016:*:*:*:*:*:*:* *cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:* *cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:* versions up to (excluding) 16.0.18526.20424 Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49706 Types: Vendor Advisory -
New CVE Received by [email protected]
Jul. 08, 2025
Action Type Old Value New Value Added Description Improper authentication in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N Added CWE CWE-287 Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49706