KEV Intelligence

Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2026-0257

PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities

Palo Alto Networks / Cloud NGFW · affected before *

View live feed Monitor via API Watch CVE
Severity
CVSS 7.8 · High
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
93.9%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-0257 is an unauthenticated PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities affecting Palo Alto Networks Cloud NGFW and 2 other products. Authentication bypass vulnerabilities in the GlobalProtect...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Palo Alto Networks / Cloud NGFW affected before *.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities

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.

Vendor Product Affected Status
Siemens RUGGEDCOM APE1808 Before * Affected
Palo Alto Networks Cloud NGFW All Unaffected
Palo Alto Networks PAN-OS Before 12.1.7, 12.1.4-h6 Affected
Palo Alto Networks PAN-OS Before 11.2.12, 11.2.10-h7, 11.2.7-h14, 11.2.4-h17 Affected
Palo Alto Networks PAN-OS 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
Palo Alto Networks PAN-OS Before 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34 Affected
Palo Alto Networks Prisma Access Before 10.2.10-h36 Affected
Palo Alto Networks Prisma Access Before 11.2.7-h13 Affected
View vendor advisory (opens in new tab)
Published
13 May 2026
Exploitation Reported
01 Jun 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

edge cisa nuclei_scanner nessus_scanner

CVE References

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CVE

Recorded 01 Jun 2026

Independent exploitation attestation added to the KEV Intelligence record.

Proof of concept available

GitHub

Recorded 10 Jun 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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Source Added
The Shadowserver First 2026-05-30 07:34 UTC
BleepingComputer 2026-05-30 18:02 UTC
CVE 2026-06-01 10:28 UTC
CISA 2026-06-02 14:00 UTC
TheHackerNews 2026-06-02 14:21 UTC
All CISA Advisories 2026-06-02 14:21 UTC
Palo Alto Unit42 2026-06-05 14:20 UTC

Operational indicators for this CVE are listed under Detection.

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
0
User-Agents
0

Raw values available in Pro and Enterprise.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Indicators of Compromise (IoCs)

Operational indicators linked to exploitation of this CVE. IoCs age over time — especially IP addresses.

Type Indicator First Seen Last Seen Age Source
IP 23.128.228.6 2026-06-05 17:24 UTC 2026-06-05 17:24 UTC 3 months ago Source
IP 104.207.144.154 2026-06-05 17:24 UTC 2026-06-05 17:24 UTC 3 months ago Source
IP 146.19.216.119 2026-06-05 17:24 UTC 2026-06-05 17:24 UTC 3 months ago Source
IP 146.19.216.120 2026-06-05 17:24 UTC 2026-06-05 17:24 UTC 3 months ago Source
IP 146.19.216.125 2026-06-05 17:24 UTC 2026-06-05 17:24 UTC 3 months ago Source
IP 179.43.172.213 2026-06-05 17:24 UTC 2026-06-05 17:24 UTC 3 months ago Source
IP 185.195.232.139 2026-06-05 17:24 UTC 2026-06-05 17:24 UTC 3 months ago Source
IP 198.12.106.60 2026-06-05 17:24 UTC 2026-06-05 17:24 UTC 3 months ago Source
IP 202.144.192.47 2026-06-05 17:24 UTC 2026-06-05 17:24 UTC 3 months ago Source

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2026/CVE-2026-0257.yaml 03 Jun 2026
Nessus https://www.tenable.com/plugins/nessus/314450 14 May 2026

Risk and context

Severity, weaknesses, and research context

CVSS v4.0

7.8 High
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

EPSS

93.9%

Weaknesses

Reliance on Cookies without Validation and Integrity Checking CWE-565

Recent mention · DarkWebInformer

Trusting a Cookie It Never Issued: The PAN-OS GlobalProtect Authentication Bypass (CVE-2026-0257)

CVE-2026-0257 is an authentication bypass in the GlobalProtect portal and gateway components of Palo Alto Networks PAN-OS software.

Read full advisory

All CVSS Scores

CVSS v4.0 7.8 High

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

CVSS v3.1 9.1 Critical

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

All Mentions

Recent mention · DarkWebInformer

Trusting a Cookie It Never Issued: The PAN-OS GlobalProtect Authentication Bypass (CVE-2026-0257)

DarkWebInformer · 21 Jul 2026

CVE-2026-0257 is an authentication bypass in the GlobalProtect portal and gateway components of Palo Alto Networks PAN-OS software.

Recent mention · TheHackerNews

Qilin Ransomware Attackers Exploit PAN-OS Authentication Bypass for Initial Access

TheHackerNews · 21 Jul 2026

Threat actors have been observed exploiting a now-patched high-severity Palo Alto Networks PAN-OS vulnerability as an entry point to deploy Qilin (aka Agenda) ransomware on victim environments. Arctic Wolf Labs said it investigated multiple intrusions in June 2026 that began with the exploitation of CVE-2026-0257 (CVSS score: 7.8), an authentication bypass flaw affecting the portal and gateway

Recent mention · Daily CyberSecurity

Qilin Ransomware Deployed via Palo Alto GlobalProtect Flaw CVE-2026-0257

Daily CyberSecurity · 21 Jul 2026

During June 2026, Arctic Wolf Labs traced several ransomware intrusions to one entry point. Attackers exploited a Palo The post Qilin Ransomware Deployed via Palo Alto GlobalProtect Flaw CVE-2026-0257 appeared first on Daily CyberSecurity.

Recent mention · TheHackerNews

Palo Alto Warns of Active Exploitation of PAN-OS GlobalProtect VPN Flaw

TheHackerNews · 15 Jun 2026

Palo Alto Networks has revealed that it has observed "active exploitation" of a recently disclosed PAN-OS vulnerability by an unknown threat actor to obtain unauthorized access to GlobalProtect portals. The vulnerability in question is CVE-2026-0257 (CVSS score: 7.8), an authentication bypass flaw affecting the portal and gateway components of PAN-OS software that could be exploited by bad

Recent mention · Palo Alto Unit42

Threat Brief: Active Exploitation of PAN-OS CVE-2026-0257

Palo Alto Unit42 · 05 Jun 2026

We include indicators of activity and mitigations for PAN-OS vulnerability CVE-2026-0257. The post Threat Brief: Active Exploitation of PAN-OS CVE-2026-0257 appeared first on Unit 42.

Recent mention · BleepingComputer

Palo Alto GlobalProtect VPN auth bypass flaw now exploited in attacks

BleepingComputer · 30 May 2026

Palo Alto Networks is warning that hackers are now exploiting a PAN-OS GlobalProtect authentication bypass flaw, tracked as CVE-2026-0257, in attacks attempting to breach corporate networks. [...]

Recent mention · TheHackerNews

PAN-OS GlobalProtect Authentication Bypass (CVE-2026-0257) Under Active Exploitation

TheHackerNews · 30 May 2026

Palo Alto Networks has warned that a recently disclosed medium-severity security flaw impacting PAN-OS and Prisma Access has come under active exploitation in the wild. The vulnerability, tracked as CVE-2026-0257 (CVSS score: 7.8), refers to a case of authentication bypass that could be exploited by bad actors to set up VPN connections. "Authentication bypass vulnerabilities in the

Recent mention · Palo Alto Networks Security Advisories

CVE-2026-0257 PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities (Severity: HIGH)

Palo Alto Networks Security Advisories · 29 May 2026

Recent mention · All CISA Advisories

CISA Adds One Known Exploited Vulnerability to Catalog

All CISA Advisories · 29 May 2026

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-0257 Palo Alto Networks PAN-OS Authentication Bypass Vulnerability This type of vulnerability is a frequent attack vectors for malicious cyber actors and poses significant risks to the federal enterprise. Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal...

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Palo Alto Networks PAN-OS - Authentication Bypass

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. Public PoC available

    Public proof-of-concept code published

  2. Indicators of compromise added (9)

    Indicators of compromise recorded

  3. KEV confirmed by Palo Alto Unit42

    Exploitation attested by an external source

  4. Nuclei template available

    Scanner coverage available

  5. KEV confirmed by All CISA Advisories

    Exploitation attested by an external source

  6. KEV confirmed by TheHackerNews

    Exploitation attested by an external source

  7. Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  8. KEV confirmed by CVE

    Exploitation attested by an external source

  9. KEV confirmed by BleepingComputer

    Exploitation attested by an external source

  10. Added to KEV Intelligence KEV Feed

    High-confidence, third-party attested exploitation

  11. Nessus plugin available

    Scanner coverage available

  12. CVE published

    Vulnerability disclosed publicly

  13. CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-0257

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2026-0257",
  "confidence": "Confirmed",
  "cvss_score": 7.8,
  "cvss_estimated": false,
  "epss_score": 0.93905,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

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