CVE-2026-50522
CRITICALDeserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
CVSS v3.1 Score
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HRelated Intelligence (6)
Fourth SharePoint Vulnerability Exploited in Past Month’s Wave of Attacks
CVE-2026-50522 is being exploited by threat actors to steal machine keys and retain long-term access. The post Fourth SharePoint Vulnerability Exploited in Past Month’s Wave of Attacks appeared first on SecurityWeek .
CISA KEV: Microsoft SharePoint — Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
Microsoft SharePoint contains a deserialization of untrusted data vulnerability which could allow an unauthorized attacker to execute code over a network.
Critical SharePoint RCE flaw exploited to steal machine keys
Hackers are actively exploiting the critical CVE-2026-50522 vulnerability in Microsoft SharePoint to steal machine keys and maintain access even after affected servers are patched. [...]
Critical SharePoint RCE CVE-2026-50522 Under Active Exploitation After Public PoC
A third SharePoint Server flaw patched by Microsoft as part of its Patch Tuesday update for July 2026 has come under active exploitation, per watchTowr. The vulnerability in question is CVE-2026-50522 (CVSS score: 9.8), a critical deserialization of untrusted data in Microsoft Office SharePoint that could allow an unauthorized attacker to execute code over a network. Microsoft credited DEVCORE
Patch Tuesday - July 2026
Microsoft is publishing 622 vulnerabilities on July 2026 Patch Tuesday , including a record-breaking 416 Windows vulnerabilities. Microsoft is aware of exploitation in the wild for two of the vulnerabilities published today, both of which are listed on CISA KEV, as well as public disclosure for one other. As usual, browser vulns are not included in the Patch Tuesday count above. Rapid7 noted last
NVD CRITICAL: CVE-2026-50522 — Deserialization of untrusted data in Microsoft Office SharePoint allows an unaut...
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.