CVE-2026-0300

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2026-05-06. Federal remediation due 2026-05-09.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

41.71% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 98.6% of scored records. A rank, not a probability.

NVD base score

9.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/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:Y/R:U/V:C/RE:M/U:Red

NVD analysis status

Analyzed. NVD last modified this record on 2026-10-26.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-05-06 18:57Z5 MO AGO

Last updated

2026-10-15 01:11Z14 DAYS AGO

Reserved

2025-11-03

Assigning CNA

palo_alto

Record state

PUBLISHED

Severity

Critical (CVSS 9.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:A/AU:Y/R:U/V:C/RE:M/U:Red

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

920ffdf291a909c2851ec15fa58cc3847aa442ae702b63ae1ae7c93ed7184732

• security.paloaltonetworks.comhttps://security.paloaltonetworks.com/CVE-2026-0300vendor-advisory
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-0300government-resource
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-967325.html