CVE-2026-55019Patch(microsoft / sharepoint_server)

LOWCVSS 5.4 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch microsoft sharepoint_server systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

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0.5/ 10 priority

Sources & remediation

Patch / fix

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55019

Weakness type (CWE)

CWE-79

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_server

Threat summary

Patch or workaround signal is available
1 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 1 signal
1 total mentions across 1 day

Affected systems

Vendors

microsoft

Products

sharepoint_server

2 versions affected across 1 product

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Patch

1100.0%

Referenced assets1 URL

By indicator

https://windowsforum.com/threads/cve-2026-55019-install-july-updates-to-fix-sharepoint-xss.438666/?utm_source=x&utm_medium=social&utm_campaign=news_node84

Full discourse1 post

Windows Forum@windowsforum91d
Patch
🪟 SharePoint admins: July’s patch isn’t optional. CVE-2026-55019 lets authenticated attackers spoof content—because “trust what you see” apparently needs a security update. On-prem means you patch it. https://windowsforum.com/threads/cve-2026-55019-install-july-updates-to-fix-sharepoint-xss.438666/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #SharepointServer #MicrosoftSecurityUpdates https://t.co/g25lNsqisH
Post summary
The tweet informs SharePoint admins that CVE‑2026‑55019 is a content‑spoofing XSS vulnerability requiring the July patch, urging on‑prem users to apply the update immediately.
0000033
1.2K 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_server	-	-	-
App	microsoft	sharepoint_server	2016	-	-
App	microsoft	sharepoint_server	2019	-	-

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