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CVE-2026-0257

Palo Alto Networks PAN-OS Authentication Bypass

9.1 CRITICALActively exploited (CISA KEV)Used in ransomwareEPSS 96.9%
  1. Published13 May 2026
  2. Added to CISA KEV29 May 2026
  3. Remediation due1 Jun 2026
Actively exploited (CISA KEV)

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

Added to KEV: 29 May 2026Federal remediation due: 1 Jun 2026Used in ransomware

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Palo Alto Networks Prisma Accessall versions
Palo Alto Networks PAN-OS< 10.2.7 · 10.2.11 · 10.2.12 · 10.2.13

Remediation

Fixed in
Palo Alto Networks PAN-OS≥ 10.2.7

References

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Frequently asked

Is CVE-2026-0257 being actively exploited?

Yes. CVE-2026-0257 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 29 May 2026. It has been used in ransomware campaigns.

How severe is CVE-2026-0257?

CVE-2026-0257 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 96.9% probability of exploitation.

Which products are affected by CVE-2026-0257?

Affected products include Palo Alto Networks Prisma Access, Palo Alto Networks PAN-OS.

How do I fix CVE-2026-0257?

Upgrade affected software to a fixed version, for example Palo Alto Networks PAN-OS 10.2.7 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-0257 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.