CVE-2021-26420(microsoft / sharepoint_enterprise_server)

LOWCVSS 8.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Microsoft SharePoint Server Remote Code Execution Vulnerability

microsoft CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Patch / fix

Vendor / third-party advisories

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

sharepoint_enterprise_server
sharepoint_foundation
sharepoint_server

Threat summary

1 mentions across 1 observed day

What's happening

1 total mentions across 1 day

Affected systems

Vendors

microsoft

Products

sharepoint_enterprise_serversharepoint_foundationsharepoint_server

3 versions affected across 3 products

Deep dive

Activity timeline1 mentions / 1d

Referenced assets1 URL

By indicator

https://community.emergingthreats.net/t/ruleset-update-summary-2026-10-15-v11312/3481

Full discourse1 post

ET Labs@ET_Labs1d
49 new OPEN, 61 new PRO (49 + 12) Adobe Commerce Checkout (CVE-2022-24086), Advantech (CVE-2023-3983, CVE-2023-5642, CVE-2025-52694), DeviceCode PhishKit, Microsoft Windows SharePoint (CVE-2021-26420), TA402, TA569, TryNodeRAT, UNK_CashGrab https://community.emergingthreats.net/t/ruleset-update-summary-2026-10-15-v11312/3481
03020267
5.7K followersView on X

CPE platform detail3 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

3 of 3 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	microsoft	sharepoint_enterprise_server	2016	-	-
App	microsoft	sharepoint_foundation	2013	-	-
App	microsoft	sharepoint_server	2019	-	-

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