CVE-2026-26106
published 2026-03-10CVE-2026-26106: Improper input validation in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
PriorityP264high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
1.37%
68.7th percentile
Improper input validation in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_sharepoint_enterprise_server_2016 | >= 16.0.0 < 16.0.5543.1000 | 16.0.5543.1000 |
| microsoft | microsoft_sharepoint_server_2019 | >= 16.0.0 < 16.0.10417.20102 | 16.0.10417.20102 |
| microsoft | microsoft_sharepoint_server_subscription_edition | >= 16.0.0 < 16.0.19725.20076 | 16.0.19725.20076 |
| microsoft | sharepoint_server | < 16.0.19725.20076 | 16.0.19725.20076 |
| microsoft | sharepoint_server | — | — |
| microsoft | sharepoint_server | — | — |
| msrc | microsoft_sharepoint_enterprise_server_2016 | — | — |
| msrc | microsoft_sharepoint_server_2019 | — | — |
| msrc | microsoft_sharepoint_server_subscription_edition | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Attacker must be authenticated with at minimum Site Member permissions (PR:L) to exploit this SharePoint RCE; monitor for unusual code execution originating from low-privileged SharePoint site member accounts. ↗
- →The vulnerability is network-based; monitor SharePoint Server for anomalous inbound network requests from authenticated but low-privileged users that result in process spawning or unexpected code execution. ↗
- ·Both SharePoint Server 2016 and SharePoint Enterprise Server 2016 are affected and share the same KB update number; ensure both variants are patched. ↗
- ·Any authenticated user can trigger this vulnerability — admin or elevated privileges are NOT required, broadening the attack surface to all site members. ↗
- ·Affected product scope is SharePoint Server (Subscription edition and others); confirm patch KB5002850, KB5002845, and KB5002843 are applied per the MSRC update guide. ↗
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vendor_msrc8.8HIGH
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Microsoft
Microsoft SharePoint Server Remote Code Execution Vulnerability
vendor_msrc·2026-03-10·CVSS 8.8
CVE-2026-26106 [HIGH] CWE-20 Microsoft SharePoint Server Remote Code Execution Vulnerability
Microsoft SharePoint Server Remote Code Execution Vulnerability
Description: Improper input validation in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
FAQ: How could an attacker exploit the vulnerability?
In a network-based attack, an authenticated attacker, who has a minimum of Site Member permissions (PR:L), could execute code remotely on the SharePoint Server.
FAQ: According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?
Any authenticated attacker could trigger this vulnerability. It does not require admin or other elevated privileges.
FAQ: I am running SharePoint Server 2016. Do the updates for SharePoint Enterprise Server 2016 also apply to the version I am running?
Yes. The same KB nu
GHSA
GHSA-prhf-v4c5-x65v: Improper input validation in Microsoft Office SharePoint allows an authorized attacker to execute code over a network
ghsa_unreviewed·2026-03-10
CVE-2026-26106 [HIGH] CWE-20 GHSA-prhf-v4c5-x65v: Improper input validation in Microsoft Office SharePoint allows an authorized attacker to execute code over a network
Improper input validation in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
No detection rules found.
No public exploits indexed.
Sophos
March Patch Tuesday visits 15 product families
blogs_sophos·2026-03-13
March Patch Tuesday visits 15 product families
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Talos
Microsoft Patch Tuesday for March 2026 — Snort rules and prominent vulnerabilities
blogs_talos·2026-03-10·CVSS 8.8
CVE-2026-26110 [HIGH] Microsoft Patch Tuesday for March 2026 — Snort rules and prominent vulnerabilities
Microsoft has released its monthly security update for March 2026 which includes 79 vulnerabilities, including three that Microsoft marked as “critical.” The remaining vulnerabilities listed are classified as “important.” Microsoft assessed that exploitation of the three “critical” vulnerabilities is “less likely.”
CVE-2026-26110 and CVE-2026-26113 are “critical” Microsoft Office Remote Code Execution Vulnerabilities that could allow an unauthorized attacker to execute code locally; the former is a type confusion issue caused by access to a resource using an incompatible type, and the latter is an untrusted pointer dereference.
CVE-2026-26144 is a “critical” information disclosure vulnerability affecting Microsoft Excel. This vulnerability is due to improper neutralization of input in Mi
Talos
Microsoft Patch Tuesday for March 2026 — Snort rules and prominent vulnerabilities
blogs_talos·2026-03-10·CVSS 8.8
CVE-2026-26110 [HIGH] Microsoft Patch Tuesday for March 2026 — Snort rules and prominent vulnerabilities
## Microsoft Patch Tuesday for March 2026 — Snort rules and prominent vulnerabilities
Microsoft has released its monthly security update for March 2026 which includes 79 vulnerabilities, including three that Microsoft marked as “critical.” The remaining vulnerabilities listed are classified as “important.” Microsoft assessed that exploitation of the three “critical” vulnerabilities is “less likely.”
CVE-2026-26110 and CVE-2026-26113 are “critical” Microsoft Office Remote Code Execution Vulnerabilities that could allow an unauthorized attacker to execute code locally; the former is a type confusion issue caused by access to a resource using an incompatible type, and the latter is an untrusted pointer dereference.
CVE-2026-26144 is a “critical” information disclosure vulnerability affecti
Bleepingcomputer
Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws
blogs_bleepingcomputer·2026-03-10·CVSS 8.8
[HIGH] Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws
## Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws
## Lawrence Abrams
The number of bugs in each vulnerability category is listed below:
46 Elevation of Privilege Vulnerabilities
2 Security Feature Bypass Vulnerabilities
18 Remote Code Execution Vulnerabilities
10 Information Disclosure Vulnerabilities
4 Denial of Service Vulnerabilities
4 Spoofing Vulnerabilities
When BleepingComputer reports on Patch Tuesday security updates, we only count those released by Microsoft today. Therefore, the number of flaws does not include 9 Microsoft Edge flaws, Mariner, Payment Orchestrator Service, Azure, and Microsoft Devices Pricing Program flaws fixed earlier this month.
To learn more about the non-security updates released today, you can review our dedicated articles on the
Wiz
CVE-2026-26106 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 8.8
CVE-2026-26106 [HIGH] CVE-2026-26106 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-26106 :
vulnerability analysis and mitigation
Improper input validation in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Source : NVD
## 8.8
Score
Published March 10, 2026
Severity HIGH
CNA Score 8.8
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 28.4
Exploitation Probability (EPSS) 0.1
Affected packages and libraries
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*
Sources
Windows Severity HIGH Has Fix Added at: Mar 13, 2026
Windows Severity HIGH Has Fix Added at: Mar 16, 2026
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Sophos
March Patch Tuesday visits 15 product families
blogs_sophos
March Patch Tuesday visits 15 product families
Share This
Microsoft on Tuesday released 84 patches affecting 15 product families – including a few you’ve possibly never encountered. Eight of the addressed issues are considered by Microsoft to be of Critical severity, though none of those affect Windows, nor are they expected to be exploited within the next 30 days. In addition, five of those Critical issues were in fact addressed by Microsoft in advance of Patch Tuesday itself, as we’ll discuss below. Twenty-two have a CVSS base score of 8.0 or higher, including one with a 9.8 base score. None are known to be under active exploit in the wild, but two are publicly disclosed so far.
At patch time, six CVEs are judged more likely to be exploited in the next 30 days by the company’s estimation. Various of this month’s issues are amenable
2026-03-10
Published