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CVE-2026-0248: Prisma Access Agent: Improper Certificate Validation Vulnerability

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-13 · updated 2026-10-26
• Weakness: CWE-295

Description

An improper certificate validation vulnerability in the Prisma Access Agent® for Android and Chrome OS enables an attacker to perform a man-in-the-middle (MitM) attack to intercept VPN traffic. By presenting a certificate for any domain issued by a trusted Certificate Authority, the attacker can capture sensitive device information. The Prisma Access Agent on macOS, Windows, Linux and iOS are not affected.

Affected products

• Palo Alto Networks Prisma Access Agent: before 26.2.1 — fixed in 26.2.1
• Palo Alto Networks Prisma Access Agent: before 26.2.1 — fixed in 26.2.1

How to fix

Upgrade to a fixed version: Palo Alto Networks Prisma Access Agent 26.2.1; Palo Alto Networks Prisma Access Agent 26.2.1. Check the vendor advisory for mitigations.

References

• https://security.paloaltonetworks.com/CVE-2026-0248

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