CVE-2026-76504

Katalog CVE

CVSS 9.8 · Critical KEV · sudah dieksploitasi EPSS 1,8%

Kerentanan Improper Handling of URL Encoding (Hex Encoding) pada cisco catalyst sd-wan manager. Skor CVSS 3.1 9.8 (Critical) menurut cisco.com. Masuk katalog KEV CISA pada 30 September 2026, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

A vulnerability in the API session-based authentication management of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to access an affected system with privileges of the admin user. This vulnerability is due to improper handling of URI encoding in an HTTP request, which allows the request to bypass an authentication rule that is intended to restrict access to a specific API endpoint. An attacker could exploit this vulnerability by sending a crafted HTTP request to the API of the affected system. A successful exploit could allow the attacker to bypass authentication and gain access to the API as the admin user.

Advisory KUTIM-CSIRT

• Peringatan Keamanan: Tiga Kerentanan Kritis Cisco FMC, ISE, dan Catalyst SD-WAN Manager 1 Okt 2026

Rincian

Terbit di NVD

30 September 2026

Terakhir diubah

3 Oktober 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-177: Improper Handling of URL Encoding (Hex Encoding)

EPSS (30 hari)

1,8% peluang dieksploitasi; lebih tinggi dari 78,1% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability

Masuk KEV

30 September 2026

Tenggat CISA

3 Oktober 2026 (untuk instansi federal AS)

Ransomware

Belum tercatat

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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-webauth-xr8beuuU mitigasi · advisory vendor
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76504 pemerintah AS