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Palo Alto Networks released fixes for CVE-2024-3393, a high-severity denial-of-service flaw in the PAN-OS DNS Security component that can be exploited remotely and without authentication using specially crafted DNS packets. Successful exploitation can force affected firewalls to reboot and, if repeated, push them into maintenance mode, leaving devices unavailable; CSIRT.SK reported the vulnerability is being actively exploited in the wild.
Affected products include multiple PAN-OS 10.1, 10.2, 11.1, and 11.2 releases, as well as Prisma Access deployments running vulnerable PAN-OS versions. Exploitation requires DNS Security Logging to be enabled along with either a DNS Security License or Advanced DNS Security License. Palo Alto urged organizations to upgrade immediately to fixed releases and to apply configuration-based mitigations where patching cannot be completed right away.
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CSIRT.SK reported that CVE-2024-3393 is being actively exploited in the wild. The notice said affected PAN-OS versions include multiple 10.1, 10.2, 11.1, and 11.2 releases, as well as Prisma Access deployments using vulnerable PAN-OS versions, when DNS Security Logging and the relevant DNS Security license are enabled.
Palo Alto Networks released security updates for CVE-2024-3393, a high-severity PAN-OS denial-of-service flaw in the DNS Security component that can be triggered remotely without authentication using specially crafted DNS packets. The issue can cause affected firewalls to reboot and, if repeatedly exploited, enter maintenance mode and become unavailable.
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Palo Alto Networks published fixes for multiple **PAN-OS** vulnerabilities affecting supported releases (including PAN-OS 12.1, 11.2, 11.1, and 10.2) and related services such as *Prisma Access* and *Prisma Browser*. The Canadian Centre for Cyber Security amplified the vendor guidance, pointing organizations to apply updates and mitigations for PAN-OS and Prisma products, including **CVE-2026-0228** and **CVE-2026-0229**, and a separate Chromium monthly update advisory referenced by Palo Alto. **CVE-2026-0229** is a network-reachable denial-of-service condition in PAN-OS’s **Advanced DNS Security (ADNS)** feature that can allow an unauthenticated attacker to trigger system reboots with a maliciously crafted packet; repeated triggering can push a firewall into maintenance mode, creating a high availability impact. Exposure requires ADNS to be enabled and a spyware profile action set to `block`, `sinkhole`, or `alert` (i.e., not `allow`); Palo Alto stated *Cloud NGFW* and *Prisma Access* are not impacted by this specific issue and reported no known exploitation. **CVE-2026-0228** involves improper certificate validation that can allow Windows Terminal Server Agents to connect using expired certificates under certain configurations, with no workaround noted by the vendor; affected organizations are advised to upgrade to fixed PAN-OS versions per Palo Alto’s guidance.
Jun 29, 2026
A **DoS vulnerability in Palo Alto Networks PAN-OS** tracked as **CVE-2024-3393** was reported as **actively exploited in the wild**, allowing **unauthenticated remote attackers** to send specially crafted **DNS** packets that can force affected firewalls to **reboot** and, with repeated triggering, potentially enter **maintenance mode**, effectively disabling perimeter enforcement. Reported impact is tied to the **data plane** when **DNS Security** is enabled and **DNS Security logging** is active, and it may affect multiple form factors (including PA-Series, VM-Series, CN-Series, and Prisma Access) where the DNS Security license is applied; advisories urge rapid patching/mitigation due to the risk of losing network security controls. Separately, researchers disclosed a **Broadcom chipset software flaw** affecting at least the **ASUS RT-BE86U** that enables an **unauthenticated, in-range attacker on 5 GHz Wi‑Fi** to send a single malformed frame that **immediately disconnects clients**, requiring a **manual router reset**; the issue was found via fuzzing, fixed by Broadcom, and addressed by ASUS in updated firmware (reported fixed in `3.0.0.6.102_37841`, affecting `3.0.0.6.102_37612` and older). A Palo Alto Networks advisory on a **Chromium monthly vulnerability update** lists multiple Chromium CVEs incorporated into Palo Alto products, but it is not directly related to the PAN-OS DNS DoS exploitation or the Broadcom/ASUS Wi‑Fi DoS issue.
Jun 29, 2026
Palo Alto Networks disclosed and patched multiple vulnerabilities in **PAN-OS** affecting **PA-Series**, **VM-Series**, and **Panorama**, including `CVE-2026-0273`, an authenticated administrator command injection flaw in the **CLI** and **web management interface** that can allow arbitrary commands to run as **root**. The vendor also fixed `CVE-2026-0272`, an authenticated **CLI privilege escalation** issue, and `CVE-2026-0266`, a **stored XSS** vulnerability in the web interface. A separate issue, `CVE-2026-0269`, can trigger a **denial of service** through crafted tunnel traffic and repeatedly reboot affected firewalls, potentially forcing them into maintenance mode. Affected versions span supported **PAN-OS 12.1, 11.2, 11.1, and 10.2** release trains, while **Cloud NGFW** and **Prisma Access** were reported as unaffected. Palo Alto Networks said it was not aware of active exploitation at disclosure time and urged customers to upgrade promptly, restrict management access to trusted internal IPs, limit CLI exposure, and use hardened jump boxes; for `CVE-2026-0273`, organizations with **Threat Prevention** can also enable dedicated **Threat IDs** to help block exploit attempts when management traffic is inspectable and decrypted.
Jun 29, 2026