CVE-2026-0257

criticalpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.950 · 100 %ileexploit · PoCDEEUNLRUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 7 exploits · PoC

Likely / severe?

95.0% (100th) EPSS

CVSS 9.1 · critical

Is it mine?

110 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2026-05-29remediate by 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.

EPSS · scored 2026-10-26

Palo Alto Networks PAN-OS Authentication Bypass Vulnerability

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedRUGGEDCOM APE1808siemens_psirt
Upgrade Palo Alto Networks Virtual NGFW V11.2.10-h7. Contact customer support to receive patch and update information
FixedRUGGEDCOM APE1808cisa_csaf_ot
Contact customer support to receive patch and update information
MitigationRUGGEDCOM APE1808siemens_psirt
Disable Authentication Override options (for generating and accepting cookies) in the GlobalProtect portal and gateway configuration
MitigationRUGGEDCOM APE1808cisa_csaf_ot
Disable Authentication Override options (for generating and accepting cookies) in the GlobalProtect portal and gateway configuration

cvss

Technical severity, 0–10. One row per scoring source.

9.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5.8–9.3

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 5.2

v3.19.3criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:Nsecondary · CISA US

v3.15.8mediumAV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · NCSC-NL NL

v3.19.3criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:Nsecondary · Siemens ProductCERT DE

v4.07.8highCVSS: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:Redsecondary · ENISA EU

v4.07.8highCVSS: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:Redsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-565USCWE-565USCWE-565USCWE-565USCWE-565US

exploits (7)

Public proof-of-concept and weaponised exploit code.

0xBlackash/CVE-2026-0257CVE-2026-0257PoC · poc_in_github
Ez4rd1x1/CVE-2026-0257testingPoC · poc_in_github
HORKimhab/CVE-2026-0257CVE-2026-0257 - PAN-OSPoC · poc_in_github
akashsingh0454/CVE-2026-0257-PoCakashsingh0454/CVE-2026-0257-PoCPoC · poc_in_github
grayxploit/CVE-2026-0257GrayXploit Security research and defensive team validate this toolkit for CVE-2026-0257 (PAN-OS GlobalProtect Authentication Bypass). Includes vulnerability assessment, detection guidance, technical analysis, indicators of compromise (IOCs), and remediation validation resources for security teams and defenders.PoC · poc_in_github
sfewer-r7/CVE-2026-0257Proof-of-concept script to leverage the PAN-OS GlobalProtect authentication bypass CVE-2026-0257PoC · poc_in_github

affected products (110)

Products and version ranges known to be affected.

Palo Alto Networks PAN-OS <10.2.10-h36all versionscert_bundDE
Palo Alto Networks PAN-OS <10.2.16-h7all versionscert_bundDE
Palo Alto Networks PAN-OS <10.2.18-h6all versionscert_bundDE
Palo Alto Networks PAN-OS <10.2.7-h34all versionscert_bundDE
Palo Alto Networks PAN-OS <11.1.10-h25all versionscert_bundDE
Palo Alto Networks PAN-OS <11.1.13-h5all versionscert_bundDE
Palo Alto Networks PAN-OS <11.1.15all versionscert_bundDE
Palo Alto Networks PAN-OS <11.1.4-h33all versionscert_bundDE
Palo Alto Networks PAN-OS <11.1.6-h32all versionscert_bundDE
Palo Alto Networks PAN-OS <11.1.7-h6all versionscert_bundDE
Palo Alto Networks PAN-OS <11.2.10-h6all versionscert_bundDE
Palo Alto Networks PAN-OS <11.2.12all versionscert_bundDE
Palo Alto Networks PAN-OS <11.2.4-h17all versionscert_bundDE
Palo Alto Networks PAN-OS <11.2.7-h13all versionscert_bundDE
Palo Alto Networks PAN-OS <12.1.4-h5all versionscert_bundDE
Palo Alto Networks PAN-OS <12.1.7all versionscert_bundDE
Palo Alto Networks PAN-OS< 10.2.10-h36cert_bundDE
Palo Alto Networks PAN-OS< 10.2.16-h7cert_bundDE
Palo Alto Networks PAN-OS< 10.2.18-h6cert_bundDE
Palo Alto Networks PAN-OS< 10.2.7-h34cert_bundDE

showing 20 of 110

advisories (4)

Vendor and ecosystem advisories describing this.

NCSC-2026-0172Kwetsbaarheid verholpen in Palo Alto Networks PAN-OS en Prisma AccessNL2026-05-30csaf · ncsc_nlNL
Palo Alto Networks heeft een kwetsbaarheid verholpen in de GlobalProtect portal- en gateway-componenten van PAN-OS.
SSA-967325SSA-967325: Multiple Vulnerabilities in Palo Alto Networks PAN-OS before V11.2.10-h7 on RUGGEDCOM APE1808 Devices2026-05-12csaf · siemens_psirtDE
Palo Alto Networks has published [1] information on vulnerabilities in PAN-OS. This advisory lists the related Siemens Industrial products affected by these vulnerabilities. Siemens has released a new version for RUGGEDCOM APE1808 and recommends to update to the latest version. Customers are advised to consult and implement the workarounds provided in Palo Alto Networks' upstream security notifications. [1] https://security.paloaltonetworks.com/
WID-SEC-W-2026-1528Palo Alto Networks PAN-OS: Mehrere SchwachstellenDeutsch2026-05-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Palo Alto Networks PAN-OS ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um einen Cross-Site Scripting Angriff durchzuführen und um Sicherheitsvorkehrungen zu umgehen.
ICSA-26-139-02Siemens RUGGEDCOM APE1808 Devices2026-05-12icsa · cisa_csaf_otUS
Palo Alto Networks has published [1] information on vulnerabilities in PAN-OS. This advisory lists the related Siemens Industrial products affected by these vulnerabilities. Siemens is preparing fix versions and recommends countermeasures for products where fixes are not, or not yet available. Customers are advised to consult and implement the workarounds provided in Palo Alto Networks' upstream security notifications. [1] https://security.paloaltonetworks.com/

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund ncsc_nl siemens_psirt cisa_csaf_ot NVD CVE.org MITRE

published 2026-05-13modified 2026-10-26

references (6)

External citations — patches, advisories, analysis.

https://nvd.nist.gov/vuln/detail/CVE-2026-0257 cnnvd
https://security.paloaltonetworks.com/CVE-2026-0257Patchcnnvd
https://security.paloaltonetworks.com/CVE-2026-0257 enisa_euvd
https://cert-portal.siemens.com/productcert/html/ssa-967325.htmlThird Party Advisorynvd
https://security.paloaltonetworks.com/CVE-2026-0257Vendor Advisorynvd
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-0257US Government Resourcenvd

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