CVE-2026-0300

Katalog CVE

CVSS 9.8 · Critical KEV · sudah dieksploitasi EPSS 31,7%

Kerentanan Out-of-bounds Write pada paloaltonetworks pan-os. Skor CVSS 3.1 9.8 (Critical) menurut NVD. Masuk katalog KEV CISA pada 6 Mei 2026, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

A buffer overflow vulnerability in the User-ID™ Authentication Portal (aka Captive Portal) service of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls by sending specially crafted packets. The risk of this issue is greatly reduced if you secure access to the User-ID™ Authentication Portal per the best practice guidelines https://knowledgebase.paloaltonetworks.com/KCSArticleDetail by restricting access to only trusted internal IP addresses. Prisma Access, Cloud NGFW and Panorama appliances are not impacted by this vulnerability.

Advisory KUTIM-CSIRT

• Peringatan Keamanan: Kerentanan Kritis CVE-2026-0300 pada Palo Alto Networks PAN-OS yang Dieksploitasi Secara Aktif 7 Mei 2026

Rincian

Terbit di NVD

6 Mei 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

9.8 (Critical), sumber NVD
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-787: Out-of-bounds Write

EPSS (30 hari)

31,7% peluang dieksploitasi; lebih tinggi dari 98,2% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability

Masuk KEV

6 Mei 2026

Tenggat CISA

9 Mei 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. Until the vendor releases an official fix, the following workaround should be implemented: - Restrict User-ID Authentication Portal access to only trusted zones. - Disable User-ID Authentication Portal if not required. 5/13/2026: Palo Alto has released a variety of patches. If these are relevant to your environment, please apply the designated patch.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD. Ditampilkan 60 dari 163 konfigurasi; daftar lengkap ada di NVD.

Referensi dan perbaikan

• https://security.paloaltonetworks.com/CVE-2026-0300 mitigasi · advisory vendor
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-0300 pemerintah AS
• https://cert-portal.siemens.com/productcert/html/ssa-967325.html advisory pihak ketiga