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CVE-2026-0257

9.1, critical Known exploited Used in ransomware

Palo Alto Networks PAN-OS Authentication Bypass Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.1, critical critical CVSS v3.1
EPSS, next 30 days
97% higher than 99.8% of scored CVEs
Exploitation
Confirmed in the wild
Published
13 May 20265 months ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 29 May 2026 and links it to ransomware activity. US federal agencies had to remediate by 1 Jun 2026, a deadline that has passed.

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

Description

Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker to bypass security restrictions and establish an unauthorized VPN connection. Panorama and Cloud NGFW are not impacted by these issues.

Details

Vendor
Palo Alto Networks and 1 more
Product
Cloud NGFW
Weakness
CWE-565 (opens in a new tab)
Status
Analyzed
Updated
17 Jun 2026
Assigner
psirt@paloaltonetworks.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References 3

Advisories 2

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Palo Alto Networks CVEs

Every Palo Alto Networks CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-0322 Palo Alto Networks PAN-OS Code Injection Vulnerability KEV EPSS 1% 7.2, high
  • CVE-2026-0300 Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability KEV EPSS 32% 9.8, critical
  • CVE-2025-0108 Palo Alto Networks PAN-OS Authentication Bypass Vulnerability KEV EPSS 98% 9.1, critical
  • CVE-2025-0111 Palo Alto Networks PAN-OS File Read Vulnerability KEV EPSS 2% 6.5, medium
  • CVE-2024-3393 Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability KEV EPSS 29% 7.5, high
  • CVE-2024-0012 Palo Alto Networks PAN-OS Management Interface Authentication Bypass Vulnerability KEV EPSS 100% 9.8, critical
  • CVE-2024-9474 Palo Alto Networks PAN-OS Management Interface OS Command Injection Vulnerability KEV EPSS 95% 7.2, high
  • CVE-2024-9463 Palo Alto Networks Expedition OS Command Injection Vulnerability KEV EPSS 99% 7.5, high

Beyond this page

Is CVE-2026-0257 in your network?

This page tells you how dangerous CVE-2026-0257 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2026-0257 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-0257 comes with the devices to patch.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.