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CVE-2026-0257: Palo Alto Networks PAN-OS

EPSS96.8%No. 317 of 1739 in KEV
CVE year2026listed the same year
Same vendor in KEV15
Same product12
FieldValue
VendorPalo Alto Networks
ProductPAN-OS
NamePalo Alto Networks PAN-OS Authentication Bypass Vulnerability
Added to KEV2026-05-29
US federal due date2026-06-01
Ransomware useKnown
CWECWE-565

CISA description

Palo Alto Networks PAN-OS contains an authentication bypass vulnerability that allows attackers to bypass security restrictions and establish an unauthorized VPN connection.

Other entries for this product

CVEVendor / productAddedEPSSRansomware
CVE-2026-0300Palo Alto Networks PAN-OS2026-05-0631.7%Unknown
CVE-2025-0111Palo Alto Networks PAN-OS2025-02-201.9%Unknown
CVE-2025-0108Palo Alto Networks PAN-OS2025-02-1898.4%Unknown
CVE-2024-3393Palo Alto Networks PAN-OS2024-12-3029.1%Unknown
CVE-2024-9474Palo Alto Networks PAN-OS2024-11-1894.8%Known
CVE-2024-0012Palo Alto Networks PAN-OS2024-11-1899.8%Known
CVE-2024-3400Palo Alto Networks PAN-OS2024-04-1299.9%Known
CVE-2022-0028Palo Alto Networks PAN-OS2022-08-222.5%Unknown
CVE-2017-15944Palo Alto Networks PAN-OS2022-08-1898.3%Unknown
CVE-2020-2021Palo Alto Networks PAN-OS2022-03-254.3%Known
CVE-2019-1579Palo Alto Networks PAN-OS2022-01-1046.2%Known

NVD — CVE-2026-0257

Data from CISA's Known Exploited Vulnerabilities (KEV) catalog. EPSS is FIRST's estimated probability of exploitation activity in the next 30 days, refreshed weekly. Always follow the vendor's official guidance.
About this page

A Palo Alto Networks PAN-OS vulnerability added to CISA's Known Exploited Vulnerabilities catalog on 2026-05-29.