How severe is CVE-2026-0265?

CVE-2026-0265 has a CVSS 4.0 base score of 7.2, rated high severity.

Is CVE-2026-0265 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-0265?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-0265 have an EU (EUVD) identifier?

Yes. CVE-2026-0265 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30066.

When was CVE-2026-0265 published?

CVE-2026-0265 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-0265

CVE-2026-0265 is a high-severity vulnerability with a CVSS 4.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.

Key facts

Severity: High (CVSS 4.0 base score 7.2)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30066
Weakness: CWE-347
Published: 2026-05-13
Last modified: 2026-06-17

Description

An authentication bypass vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled. The risk is higher if CAS is enabled on the management interface and lower when any other login interfaces are used. The risk of this issue is greatly reduced if you secure access to the management web interface by restricting access to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma Access® are not impacted by this vulnerability.

Frequently asked questions

What is CVE-2026-0265?: An authentication bypass vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled. The risk is higher if CAS is enabled on the management interface and lower when any other login interfaces are used. The risk of this issue is greatly reduced if you secure access to the management web interface by restricting access to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma Access® are not impacted by this vulnerability.
How severe is CVE-2026-0265?: CVE-2026-0265 has a CVSS 4.0 base score of 7.2, rated high severity.
Is CVE-2026-0265 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-0265?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-0265 have an EU (EUVD) identifier?: Yes. CVE-2026-0265 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30066.
When was CVE-2026-0265 published?: CVE-2026-0265 was published on 2026-05-13 and last updated on 2026-06-17.

References

Other CWE-347 (Improper Verification of Cryptographic Signature) vulnerabilities

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CVE-2021-33885 — Critical (CVSS 10.0): An Insufficient Verification of Data Authenticity vulnerability in B. Braun SpaceCom2 prior to 012U000062 allows a…

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