CVE-2026-20963CRITICAL 9.8CISA KEVEPSS p98.0%
CVE-2026-20963Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
Microsoft / SharePoint
Description
Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.
Scoring
| CVSS 3.1 | 9.8 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 31.11% probability of exploitation · percentile 98.0% · 2026-06-19T12:03:05Z |
| Published | 2026-01-13 |
| Last modified | 2026-04-01 |
CISA KEV entry
Added to KEV: 2026-03-18
Underlying weaknesses· 1
References
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Deserialization of Untrusted Datacwe-502 | 0% | live |
(incoming)1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| KEVEntry | Microsoft SharePoint Deserialization of Untrusted Data Vulnerabilitykev-cve-2026-20963 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.