CVE Details
CVE-2026-56164
Microsoft SharePoint Server Missing Authentication for Critical Function Vulnerability
Published: 2026-07-14
CVSS: 5.3 MEDIUM
Product: Microsoft SharePoint Server
Due Date: 2026-07-17
Microsoft SharePoint contains a missing authentication for critical function vulnerability that allows an unauthorized attacker to elevate privileges over a network.
GitHub PoC
Warning: GitHub PoC repositories are unverified. Some may be fake
or contain malware. Use caution and review code before running anything.
No GitHub PoC data.
FIRST EPSS
EPSS estimates the probability of exploitation in the next 30 days. Higher values indicate higher likelihood of real-world exploitation.
No EPSS data.
Timeline
CVE Stalker
KEV
MITRE
GitHub
FIRST (EPSS)
MITRE
CVSS
SSVC
References
Show Raw Data
| Key | Remaining Key | Value |
|---|---|---|
| dataType | CVE_RECORD | |
| dataVersion | 5.2 | |
| cveMetadata > | cveId | CVE-2026-56164 |
| cveMetadata > | assignerOrgId | f38d906d-7342-40ea-92c1-6c4a2c6478c8 |
| cveMetadata > | state | PUBLISHED |
| cveMetadata > | assignerShortName | microsoft |
| cveMetadata > | dateReserved | 2026-06-19T13:53:31.988Z |
| cveMetadata > | datePublished | 2026-07-14T17:05:12.313Z |
| cveMetadata > | dateUpdated | 2026-07-14T19:58:23.595Z |
| containers > | cna > title | Microsoft SharePoint Server Elevation of Privilege Vulnerability |
| containers > | cna > datePublic | 2026-07-14T14:00:00.000Z |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > operator | OR |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > negate | False |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > criteria | cpe:2.3:a:microsoft:sharepoint_server_2016:*:*:*:*:enterprise:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > versionStartIncluding | 16.0.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > versionEndExcluding | 16.0.5561.1001 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > criteria | cpe:2.3:a:microsoft:sharepoint_server_2019:*:*:*:*:*:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > versionStartIncluding | 16.0.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > versionEndExcluding | 16.0.10417.20175 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > criteria | cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > versionStartIncluding | 16.0.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > versionEndExcluding | 16.0.19725.20434 |
| containers > | cna > affected > 0 > vendor | Microsoft |
| containers > | cna > affected > 0 > product | Microsoft SharePoint Enterprise Server 2016 |
| containers > | cna > affected > 0 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 0 > versions > 0 > version | 16.0.0 |
| containers > | cna > affected > 0 > versions > 0 > lessThan | 16.0.5561.1001 |
| containers > | cna > affected > 0 > versions > 0 > versionType | custom |
| containers > | cna > affected > 0 > versions > 0 > status | affected |
| containers > | cna > affected > 1 > vendor | Microsoft |
| containers > | cna > affected > 1 > product | Microsoft SharePoint Server 2019 |
| containers > | cna > affected > 1 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 1 > versions > 0 > version | 16.0.0 |
| containers > | cna > affected > 1 > versions > 0 > lessThan | 16.0.10417.20175 |
| containers > | cna > affected > 1 > versions > 0 > versionType | custom |
| containers > | cna > affected > 1 > versions > 0 > status | affected |
| containers > | cna > affected > 2 > vendor | Microsoft |
| containers > | cna > affected > 2 > product | Microsoft SharePoint Server Subscription Edition |
| containers > | cna > affected > 2 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 2 > versions > 0 > version | 16.0.0 |
| containers > | cna > affected > 2 > versions > 0 > lessThan | 16.0.19725.20434 |
| containers > | cna > affected > 2 > versions > 0 > versionType | custom |
| containers > | cna > affected > 2 > versions > 0 > status | affected |
| containers > | cna > descriptions > 0 > value | Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network. |
| containers > | cna > descriptions > 0 > lang | en-US |
| containers > | cna > problemTypes > 0 > descriptions > 0 > description | CWE-306: Missing Authentication for Critical Function |
| containers > | cna > problemTypes > 0 > descriptions > 0 > lang | en-US |
| containers > | cna > problemTypes > 0 > descriptions > 0 > type | CWE |
| containers > | cna > problemTypes > 0 > descriptions > 0 > cweId | CWE-306 |
| containers > | cna > providerMetadata > orgId | f38d906d-7342-40ea-92c1-6c4a2c6478c8 |
| containers > | cna > providerMetadata > shortName | microsoft |
| containers > | cna > providerMetadata > dateUpdated | 2026-07-14T19:37:20.775Z |
| containers > | cna > references > 0 > name | Microsoft SharePoint Server Elevation of Privilege Vulnerability |
| containers > | cna > references > 0 > tags > 0 | vendor-advisory |
| containers > | cna > references > 0 > tags > 1 | patch |
| containers > | cna > references > 0 > url | https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56164 |
| containers > | cna > metrics > 0 > format | CVSS |
| containers > | cna > metrics > 0 > scenarios > 0 > lang | en-US |
| containers > | cna > metrics > 0 > scenarios > 0 > value | GENERAL |
| containers > | cna > metrics > 0 > cvssV3_1 > version | 3.1 |
| containers > | cna > metrics > 0 > cvssV3_1 > baseSeverity | MEDIUM |
| containers > | cna > metrics > 0 > cvssV3_1 > baseScore | 5.3 |
| containers > | cna > metrics > 0 > cvssV3_1 > vectorString | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:F/RL:O/RC:C |
| containers > | adp > 0 > metrics > 0 > other > type | ssvc |
| containers > | adp > 0 > metrics > 0 > other > content > id | CVE-2026-56164 |
| containers > | adp > 0 > metrics > 0 > other > content > role | CISA Coordinator |
| containers > | adp > 0 > metrics > 0 > other > content > options > 0 > Exploitation | active |
| containers > | adp > 0 > metrics > 0 > other > content > options > 1 > Automatable | yes |
| containers > | adp > 0 > metrics > 0 > other > content > options > 2 > Technical Impact | partial |
| containers > | adp > 0 > metrics > 0 > other > content > version | 2.0.3 |
| containers > | adp > 0 > metrics > 0 > other > content > timestamp | 2026-07-14T18:45:11.388695Z |
| containers > | adp > 0 > metrics > 1 > other > type | kev |
| containers > | adp > 0 > metrics > 1 > other > content > dateAdded | 2026-07-14 |
| containers > | adp > 0 > metrics > 1 > other > content > reference | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56164 |
| containers > | adp > 0 > references > 0 > url | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56164 |
| containers > | adp > 0 > references > 0 > tags > 0 | government-resource |
| containers > | adp > 0 > title | CISA ADP Vulnrichment |
| containers > | adp > 0 > providerMetadata > orgId | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| containers > | adp > 0 > providerMetadata > shortName | CISA-ADP |
| containers > | adp > 0 > providerMetadata > dateUpdated | 2026-07-14T19:58:23.595Z |
| containers > | adp > 0 > timeline > 0 > time | 2026-07-14T00:00:00.000Z |
| containers > | adp > 0 > timeline > 0 > lang | en |
| containers > | adp > 0 > timeline > 0 > value | CVE-2026-56164 added to CISA KEV |