CVE-2026-21509

Katalog CVE

CVSS 7.8 · High KEV · sudah dieksploitasi EPSS 70,8%

Kerentanan Reliance on Untrusted Inputs in a Security Decision pada microsoft 365 apps, microsoft office +1 lainnya. Skor CVSS 3.1 7.8 (High) menurut microsoft.com. Masuk katalog KEV CISA pada 26 Januari 2026, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

Reliance on untrusted inputs in a security decision in Microsoft Office allows an unauthorized attacker to bypass a security feature locally.

Rincian

Terbit di NVD

26 Januari 2026

Terakhir diubah

25 Juni 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-807: Reliance on Untrusted Inputs in a Security Decision

EPSS (30 hari)

70,8% peluang dieksploitasi; lebih tinggi dari 99,3% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

Microsoft Office Security Feature Bypass Vulnerability

Masuk KEV

26 Januari 2026

Tenggat CISA

16 Februari 2026 (untuk instansi federal AS)

Ransomware

Belum tercatat

Tindakan wajib

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21509 advisory vendor
• https://www.vicarius.io/vsociety/posts/cve-2026-21509-mitigation-script-microsoft-office-security-feature-bypa... mitigasi · advisory pihak ketiga
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21509 pemerintah AS
• https://www.vicarius.io/vsociety/posts/cve-2026-21509-detection-script-microsoft-office-security-feature-bypas... advisory pihak ketiga