CVE-2026-0250

SYSTEM code execution via Portal-Gateway message overflow

Published May 13, 2026 · Updated May 13, 2026

Out-of-bounds write in Palo Alto Networks GlobalProtect App and UWP App allows man-in-the-middle attackers to execute SYSTEM code. The apps write beyond a buffer while processing Portal-Gateway requests and responses; Palo Alto Networks has not identified the routine or message field. No special configuration or user interaction is required, and exploitation can interrupt system processes or execute code with SYSTEM privileges.

CVSS severity7.7
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Palo Alto Networks GlobalProtect App and UWP App allows man-in-the-middle attackers to execute SYSTEM code. The apps write beyond a buffer while processing Portal-Gateway requests and responses; Palo Alto Networks has not identified the routine or message field. No special configuration or user interaction is required, and exploitation can interrupt system processes or execute code with SYSTEM privileges.

The record

CVE
CVE-2026-0250
Published
May 13, 2026
Updated
May 13, 2026
Vendor
Palo Alto Networks
Product
GlobalProtect UWP App
Classifications
CWE-787, CAPEC-540, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.3 <6.3.3-h10 changes=[{"at":"6.3.3-h10","status":"unaffected"}]

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Palo Alto Networks · GlobalProtect UWP Appversion=6.3 <6.3.3-h10 changes=[{"at":"6.3.3-h10","status":"unaffected"}]
Palo Alto Networks · GlobalProtect Appversion=6.0.0 <6.0.11 changes=[{"at":"6.0.11","status":"unaffected"}]; version=6.0 <6.0.13 changes=[{"at":"6.0.13","status":"unaffected"}]; version=6.0 <6.0.14 changes=[{"at":"6.0.14","status":"unaffected"}]; version=6.1 <6.1.13 changes=[{"at":"6.1.13","status":"unaffected"}]; version=6.2.0 <6.2.8-h10 (6.2.8-948) changes=[{"at":"6.2.8-h10 (6.2.8-948)","status":"unaffected"}]; version=6.3.0 <6.3.3-h2 (6.3.3-42) changes=[{"at":"6.3.3-h2 (6.3.3-42)","status":"unaffected"}]; version=6.3.0 <6.3.3-h9 (6.3.3-999) changes=[{"at":"6.3.3-h9 (6.3.3-999)","status":"unaffected"}]

Published CVSS scores

7.7Palo Alto NetworksCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
5.2Palo Alto NetworksCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CAPEC-540Overread Buffers
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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