CVE-2026-33113
Microsoft SharePoint Server Spoofing Vulnerability
No known exploitation. EPSS puts it in the 42nd percentile. Fixed versions are out.
No public exploit knownFix4 products3 fixed builds listed below
e.g. OID 1.3.6.1.4.1.25623.1.0.837685
What to do
Find your product and version, then upgrade to the build on the right.
- Microsoft SharePoint Enterprise Server 2016Affected: ≥ 16.0.0, < 16.0.5556.1005Upgrade to: 16.0.5556.1005Stated by: CVE record
- Microsoft SharePoint Server 2019Affected: ≥ 16.0.0, < 16.0.10417.20153Upgrade to: 16.0.10417.20153Stated by: CVE record
- Microsoft SharePoint Server Subscription EditionAffected: ≥ 16.0.0, < 16.0.19725.20384Upgrade to: 16.0.19725.20384Stated by: CVE record
- Microsoft Sharepoint ServerAffected: < 16.0.19725.20384Upgrade to: 16.0.19725.20384Stated by: NVD
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.5% chance of exploitation activity in the next 30 days, which ranks it in the 42nd percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
10 events over 44 days, from the signal feeds we watch.
- Patch availablerecord updated
- Patch availablerecord updated
- OpenVAS check added
- Patch availablerecord updated
- Publishedweakness classified, att&ck mapped
Affected products
- Microsoft SharePoint Enterprise Server 2016Enterprise Software / itsm-monitoring
- Microsoft SharePoint Server 2019Enterprise Software / itsm-monitoring
- Microsoft SharePoint Server Subscription EditionEnterprise Software / collaboration-groupware
- sharepoint serverEnterprise Software / collaboration-groupware
And 3 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Scored 5.4 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality LowSome restricted information is disclosed, but limited in scope
- Integrity LowData modification is possible but limited in scope or consequence
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
Watch the software you run.
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