Home › Exploited CVEs › CVE-2026-20963
CVE-2026-20963: Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
Microsoft SharePoint · in CISA KEV since 2026-03-18
Need it fresh, filtered or via API?These pages are a free snapshot, last updated 2026-11-07.
Secure Stripe checkout (card, Apple Pay, Google Pay) · 14-day fix-or-refund if it doesn't work as described · terms
- Kevscope CVE priority API 200 free calls a day, $5 for 2,000 calls (no expiry), or $19/month for 10,000: returns a patch-priority verdict for up to 20 CVEs per call with the evidence (KEV, EPSS, CVSS, CISA SSVC), most urgent first, by API or MCP.
- Kevscope API $5 pack $5 for 2,000 calls, never expires: patch-priority verdicts for up to 20 CVEs per call from today's KEV, EPSS, CVSS and SSVC data, by REST API or MCP. Pay by card, your API key is on screen the moment checkout ends; no account, no subscription.
- Exploited Vulnerabilities Brief: Weekly Edition $9/month: a fresh KEV + EPSS brief every Monday (PDF + CSVs): new exploited CVEs, what to patch first, upcoming CISA deadlines.
- All Three Monday Briefs: Rates, Recalls + Exploited Vulns $25/month: all three weekly briefs (Treasury/BLS rates & macro, NHTSA recalls, CISA KEV/EPSS) for $25/month instead of $37.
Secure Stripe checkout (card, Apple Pay, Google Pay) · 14-day fix-or-refund if it doesn't work as described · terms
2026-03-18added to KEV
2026-03-21federal remediation due date
29.20%EPSS exploit probability (30 days) 98.2th percentile
9.8 CRITICALCVSS 3.1
Unknownknown ransomware use
64days from NVD publication to KEV
What it is
Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-502 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2026-01-13 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2026-20963.json · all KEV CVEs
🔔 Get a browser alert when CISA adds a new KEV entry (free, no email, one click to stop).
Kevscope: daily CISA KEV + EPSS datasetThe whole KEV catalog joined with daily EPSS and CVSS scores as CSV/Parquet, refreshed daily. Free to download.
Get the full file: Exploited Vulnerabilities Brief: Weekly Edition ($9/month): each week's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief: Weekly Edition ($9/month): each week's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.