CVE-2026-0257 | PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities

Exp

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.

Published: 2026-05-13 Last update: 2026-06-01 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-0257 is rated Critical Active Threat (95.4/100): CVSS High severity, with high exploitation likelihood (EPSS 46.45%, 98th percentile). CISA KEV confirms active exploitation (added 2026-05-29) affecting Palo Alto Networks / PAN-OS. a weakness (CWE-565) Unauthenticated remote administrative access may be possible. EPSS rose +10.11% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2026-0257

Name: Palo Alto Networks PAN-OS Authentication Bypass Vulnerability · CISA KEV detail

Exploit added: 2026-05-29

Action due: 2026-06-01

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.

Exploit prediction scoring system (EPSS) score for CVE-2026-0257

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-04 36.34% 46.45% +10.11%
2 2026-06-02 41.50% 36.34% -5.16%
3 2026-05-30 — 41.50% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-0257

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 4.0 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/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 Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:N)
No privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:L)
Limited confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:N)
No integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:N)
No availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:H)
High confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:H)
High integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.
Exploit maturity (threat) (E:A)
Attacked: exploitation has been reported, or toolkits exist that simplify exploitation.
Confidentiality requirement (CR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Integrity requirement (IR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Availability requirement (AR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Modified attack vector (MAV:X)
Not defined: scoring uses the Base Attack Vector (AV).
Modified attack complexity (MAC:X)
Not defined: scoring uses the Base Attack Complexity (AC).
Modified attack requirements (MAT:X)
Not defined: scoring uses the Base Attack Requirements (AT).
Modified privileges required (MPR:X)
Not defined: scoring uses the Base Privileges Required (PR).
Modified user interaction (MUI:X)
Not defined: scoring uses the Base User Interaction (UI).
Modified vulnerable system confidentiality impact (MVC:X)
Not defined: scoring uses the Base VC metric.
Modified vulnerable system integrity impact (MVI:X)
Not defined: scoring uses the Base VI metric.
Modified vulnerable system availability impact (MVA:X)
Not defined: scoring uses the Base VA metric.
Modified subsequent system confidentiality impact (MSC:X)
Not defined: scoring uses the Base SC metric.
Modified subsequent system integrity impact (MSI:X)
Not defined: scoring uses the Base SI metric.
Modified subsequent system availability impact (MSA:X)
Not defined: scoring uses the Base SA metric.
Safety (supplemental) (S:X)
Not evaluated.
Automatable (supplemental) (AU:N)
No: attackers cannot reliably automate reconnaissance through exploitation for this issue.
Recovery (supplemental) (R:A)
Automatic: services recover on their own after an attack.
Value density (supplemental) (V:D)
Diffuse: a single exploit event controls relatively limited resources (e.g., one client).
Vulnerability response effort (supplemental) (RE:M)
Moderate effort (remote update, disable subsystem, simple upgrade with minor service impact).
Provider urgency (supplemental) (U:RED)
Red: provider rates highest urgency.
 — — [email protected]
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 5.2 [email protected]

Weakness enumeration for CVE-2026-0257

GitHub Security Advisory for CVE-2026-0257

GHSA-jqxw-84hx-6qj5 · Severity: medium — Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto...

Affected software / configurations for CVE-2026-0257

Vendor Product Version Raw CPE
paloaltonetworks pan-os < 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:-:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h1:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h12:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h16:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h18:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h19:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h21:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h24:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h3:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h32:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h6:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.7 cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h8:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.8 cpe:2.3:o:paloaltonetworks:pan-os:10.2.8:*:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.9 cpe:2.3:o:paloaltonetworks:pan-os:10.2.9:*:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:-:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h10:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h12:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h14:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h17:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h18:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h2:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h21:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h27:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h3:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h30:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h31:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h4:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h5:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h7:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.10 cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h9:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.11 cpe:2.3:o:paloaltonetworks:pan-os:10.2.11:*:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.12 cpe:2.3:o:paloaltonetworks:pan-os:10.2.12:*:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.13 cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:-:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.13 cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h1:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.13 cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h10:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.13 cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h16:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.13 cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h18:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.13 cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h2:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.13 cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h3:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.13 cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h4:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.13 cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h5:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.13 cpe:2.3:o:paloaltonetworks:pan-os:10.2.13:h7:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.14 cpe:2.3:o:paloaltonetworks:pan-os:10.2.14:*:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.15 cpe:2.3:o:paloaltonetworks:pan-os:10.2.15:*:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.16 cpe:2.3:o:paloaltonetworks:pan-os:10.2.16:-:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.16 cpe:2.3:o:paloaltonetworks:pan-os:10.2.16:h1:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.16 cpe:2.3:o:paloaltonetworks:pan-os:10.2.16:h4:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.16 cpe:2.3:o:paloaltonetworks:pan-os:10.2.16:h6:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.17 cpe:2.3:o:paloaltonetworks:pan-os:10.2.17:*:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.18 cpe:2.3:o:paloaltonetworks:pan-os:10.2.18:-:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.18 cpe:2.3:o:paloaltonetworks:pan-os:10.2.18:h1:*:*:*:*:*:*
paloaltonetworks pan-os 10.2.18 cpe:2.3:o:paloaltonetworks:pan-os:10.2.18:h5:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.0 cpe:2.3:o:paloaltonetworks:pan-os:11.1.0:*:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.1 cpe:2.3:o:paloaltonetworks:pan-os:11.1.1:*:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.2 cpe:2.3:o:paloaltonetworks:pan-os:11.1.2:*:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.3 cpe:2.3:o:paloaltonetworks:pan-os:11.1.3:*:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:-:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h1:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h13:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h15:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h16:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h17:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h18:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h25:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h27:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h32:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h4:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h7:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.4 cpe:2.3:o:paloaltonetworks:pan-os:11.1.4:h9:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.5 cpe:2.3:o:paloaltonetworks:pan-os:11.1.5:*:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.6 cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:-:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.6 cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h1:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.6 cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h10:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.6 cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h14:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.6 cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h17:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.6 cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h19:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.6 cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h2:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.6 cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h20:*:*:*:*:*:*
paloaltonetworks pan-os 11.1.6 cpe:2.3:o:paloaltonetworks:pan-os:11.1.6:h21:*:*:*:*:*:*

References for CVE-2026-0257

cvelogic Threat Intelligence