CVE-2026-0257
HighExploitedPublic exploitAuthentication 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.
Published May 15, 2026 · Updated Oct 15, 2026
Key Facts
Patch immediately- CVE-2026-0257 is a high-severity vulnerability (CVSS 7.8 v4) affecting PAN-OS (Palo Alto Networks), Prisma Access (Palo Alto Networks), Ruggedcom Ape1808 Firmware (Siemens) and 1 more product.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 29, 2026 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 97% probability of exploitation in the next 30 days.
- Fixed versions are available, including PAN-OS 10.2.18-h6_10.2.16-h7_10.2.13-h21_10.2.10-h36_10.2.7-h34, PAN-OS 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34, PAN-OS 11.1.15_11.1.13-h5_11.1.10-h25_11.1.7-h6_11.1.6-h32_11.1.4-h33.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v4
7.8
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:D/RE:M/U:Red
EPSS (30-day exploit likelihood)
97%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-0257 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | May 29, 2026 | Jun 1, 2026 | Known |
| Industry KEV feed | May 29, 2026 | Jun 1, 2026 | Known |
| CIRCL KEV | May 29, 2026 | Jun 1, 2026 | Not reported |
| ENISA EUVD | May 29, 2026 | n/a | Not reported |
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.
Affected Products
226 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| PAN-OSPalo Alto Networks | 10.2.10, 10.2.10-h10, 10.2.10-h12, 10.2.10-h14, 10.2.10-h17, 10.2.10-h18, 10.2.10-h2, 10.2.10-h21 | 12.1.7_12.1.4-h6 |
| Prisma AccessPalo Alto Networks | >= 10.2.0 | 10.2.10-h36 |
| Ruggedcom Ape1808 FirmwareSiemens | See advisory | n/a |
| Cloud NGFW | See advisory | n/a |
Patched Releases
PAN-OS
10.2.18-h6_10.2.16-h7_10.2.13-h21_10.2.10-h36_10.2.7-h34, 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34, 11.1.15_11.1.13-h5_11.1.10-h25_11.1.7-h6_11.1.6-h32_11.1.4-h33, 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33, 11.2.12_11.2.10-h7_11.2.7-h14_11.2.4-h17, 11.2.12, 11.2.10-h7, 11.2.7-h14, 11.2.4-h17, 12.1.7_12.1.4-h6, 12.1.7, 12.1.4-h6
Prisma Access
10.2.10-h36, 11.2.7-h13
paloaltonetworks pan-os
10.2.7
Timeline
Publicly disclosed
May 15, 2026
Added to CISA KEV
May 29, 2026
Added to Industry KEV feed
May 29, 2026
Added to CIRCL KEV
May 29, 2026
Added to ENISA EUVD
May 29, 2026
Last updated
Oct 15, 2026
Weakness Type
- CWE-565 Reliance on Cookies without Validation and Integrity Checking
References
- advisoryhttps://security.paloaltonetworks.com/CVE-2026-0238
- advisoryhttps://security.paloaltonetworks.com/CVE-2026-0250
- advisoryhttps://security.paloaltonetworks.com/CVE-2026-0251
- advisoryhttps://security.paloaltonetworks.com/CVE-2026-0256
- advisoryVulnCheck exploitation report
FAQ
Common Questions.
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.
Affected: PAN-OS (Palo Alto Networks) versions 10.2.10, 10.2.10-h10, 10.2.10-h12, 10.2.10-h14, 10.2.10-h17, 10.2.10-h18, 10.2.10-h2, 10.2.10-h21; Prisma Access (Palo Alto Networks) versions >= 10.2.0; Ruggedcom Ape1808 Firmware (Siemens), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 29, 2026 and is known to be used in ransomware campaigns.
Yes. It was added on May 29, 2026 with a federal remediation due date of Jun 1, 2026.
Public exploit code is available.
Fixed versions are available, including PAN-OS 10.2.18-h6_10.2.16-h7_10.2.13-h21_10.2.10-h36_10.2.7-h34, PAN-OS 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34, PAN-OS 11.1.15_11.1.13-h5_11.1.10-h25_11.1.7-h6_11.1.6-h32_11.1.4-h33.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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