---
title: "CVE-2026-0257: PAN-OS: GlobalProtect Authentication… | CubePath"
description: "Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker to bypass…"
language: en
source: https://cubepath.com/security/cve/CVE-2026-0257
---

# CVE-2026-0257: PAN-OS: GlobalProtect Authentication… | CubePath

## 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.

Official description from the CVE record, published by palo\_alto. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-0257)

## Key data

### CVSS 4.0 High 7.8

Score published by palo\_alto in the CVE record.

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/AU:N/R:A/V:D/RE:M/U:Red

| Metric                              | Value   | What it means                                                                                                   |
| ----------------------------------- | ------- | --------------------------------------------------------------------------------------------------------------- |
| Attack vector                       | Network | The vulnerable component can be reached over a network, possibly from the Internet.                             |
| Attack complexity                   | Low     | No measurable action is needed to get around the system's built-in security controls. The attack is repeatable. |
| Attack requirements                 | None    | The attack works without any special deployment or execution conditions.                                        |
| Privileges required                 | None    | No account or privileges are needed.                                                                            |
| User interaction                    | None    | No action from any user is needed.                                                                              |
| Vulnerable system: confidentiality  | Low     | Limited effect on the secrecy of data.                                                                          |
| Vulnerable system: integrity        | None    | No effect on the trustworthiness of data.                                                                       |
| Vulnerable system: availability     | None    | No effect on availability.                                                                                      |
| Subsequent systems: confidentiality | High    | Serious or total effect on other systems' data secrecy.                                                         |
| Subsequent systems: integrity       | High    | Serious or total effect on other systems' data trustworthiness.                                                 |
| Subsequent systems: availability    | None    | No effect on other systems' availability.                                                                       |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.95642 (95.6% probability)

Percentile

99.9%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog

Palo Alto Networks PAN-OS Authentication Bypass Vulnerability

Added to the catalog

May 29, 2026

Federal due date

Jun 1, 2026

Ransomware campaigns

Known use

### CISA assessment as of May 28, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Recorded by CISA as active

Automatable

no

Technical impact

total

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-565](https://cwe.mitre.org/data/definitions/565.html) Reliance on Cookies without Validation and Integrity Checking

## Affected products

Products listed in the CVE record, as the CNA published them.

- Palo Alto Networks PAN-OS

  - affected: 12.1.0 up to before 12.1.7, 12.1.4-h6
  - affected: 11.2.0 up to before 11.2.12, 11.2.10-h7, 11.2.7-h14, 11.2.4-h17
  - affected: 11.1.0 up to before 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33
  - affected: 10.2.0 up to before 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34
- Palo Alto Networks Prisma Access

  - affected: 10.2.0 up to before 10.2.10-h36
  - affected: 11.2.0 up to before 11.2.7-h13

### Listed as not affected

- Palo Alto Networks Cloud NGFW

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [security.paloaltonetworks.com/CVE-2026-0257](https://security.paloaltonetworks.com/CVE-2026-0257) vendor-advisory

## Timeline

1. ID reserved Nov 3, 2025
2. Record published May 13, 2026
3. Added to CISA KEV May 29, 2026
4. Record last updated Oct 15, 2026

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:11 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)