CVE-2026-45659

Katalog CVE

CVSS 8.8 · High KEV · sudah dieksploitasi Dipakai ransomware EPSS 2,7%

Kerentanan Deserialization of Untrusted Data pada microsoft sharepoint server. Skor CVSS 3.1 8.8 (High) menurut microsoft.com. Masuk katalog KEV CISA pada 1 Juli 2026, artinya sudah terbukti dieksploitasi. Tercatat dipakai dalam kampanye ransomware.

Deskripsi (NVD)

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Advisory KUTIM-CSIRT

• Peringatan Keamanan: Kerentanan CVE-2026-45659 pada Microsoft SharePoint Server yang Dieksploitasi Secara Aktif 2 Jul 2026

Rincian

Terbit di NVD

22 Mei 2026

Terakhir diubah

23 Juli 2026

Status NVD

Analyzed

CVSS 3.1

8.8 (High), sumber microsoft.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-502: Deserialization of Untrusted Data

EPSS (30 hari)

2,7% peluang dieksploitasi; lebih tinggi dari 85,5% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability

Masuk KEV

1 Juli 2026

Tenggat CISA

4 Juli 2026 (untuk instansi federal AS)

Ransomware

Tercatat dipakai dalam kampanye ransomware

Tindakan wajib

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45659 advisory vendor
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45659 pemerintah AS