CVE-2026-0288: CWE-787 Out-of-bounds Write in Palo Alto Networks Cloud NGFW
CVE-2026-0288 is a high-severity vulnerability in the User-ID Terminal Server Agent component of Palo Alto Networks PAN-OS software used in Cloud NGFW. It involves multiple buffer overflow issues that allow an unauthenticated attacker with network access to cause denial of service or potentially execute arbitrary code by sending crafted network traffic. The risk is reduced when connectivity to the Terminal Server Agent is restricted to trusted internal IP addresses. Panorama products are not affected by this vulnerability.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-0288) affects the User-ID Terminal Server Agent (TSA) component of Palo Alto Networks PAN-OS software in Cloud NGFW. It consists of multiple buffer overflow (CWE-787) vulnerabilities that can be triggered remotely by an unauthenticated attacker via specially crafted network traffic. Successful exploitation may lead to denial of service or arbitrary code execution. The vulnerability requires network access and is mitigated by restricting TSA connectivity to trusted internal IP addresses. No patch or official remediation level has been published yet. Panorama is not impacted.
Potential Impact
An unauthenticated attacker with network access to the User-ID Terminal Server Agent can cause a denial of service or potentially execute arbitrary code. This could disrupt firewall operations or allow compromise of the affected system. The impact is high severity as indicated by the CVSS 7.2 score. However, restricting TSA connectivity to trusted internal IP addresses reduces the attack surface.
Mitigation Recommendations
No official patch or fix has been published yet. It is recommended to follow Palo Alto Networks' best practice of restricting User-ID Terminal Server Agent connectivity to trusted internal IP addresses only to minimize exposure. Monitor the vendor advisory for updates on patch availability and apply official fixes once released.
CVE-2026-0288: CWE-787 Out-of-bounds Write in Palo Alto Networks Cloud NGFW
Description
CVE-2026-0288 is a high-severity vulnerability in the User-ID Terminal Server Agent component of Palo Alto Networks PAN-OS software used in Cloud NGFW. It involves multiple buffer overflow issues that allow an unauthenticated attacker with network access to cause denial of service or potentially execute arbitrary code by sending crafted network traffic. The risk is reduced when connectivity to the Terminal Server Agent is restricted to trusted internal IP addresses. Panorama products are not affected by this vulnerability.
CVSS v4.0
Score 7.2high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-0288) affects the User-ID Terminal Server Agent (TSA) component of Palo Alto Networks PAN-OS software in Cloud NGFW. It consists of multiple buffer overflow (CWE-787) vulnerabilities that can be triggered remotely by an unauthenticated attacker via specially crafted network traffic. Successful exploitation may lead to denial of service or arbitrary code execution. The vulnerability requires network access and is mitigated by restricting TSA connectivity to trusted internal IP addresses. No patch or official remediation level has been published yet. Panorama is not impacted.
Potential Impact
An unauthenticated attacker with network access to the User-ID Terminal Server Agent can cause a denial of service or potentially execute arbitrary code. This could disrupt firewall operations or allow compromise of the affected system. The impact is high severity as indicated by the CVSS 7.2 score. However, restricting TSA connectivity to trusted internal IP addresses reduces the attack surface.
Mitigation Recommendations
No official patch or fix has been published yet. It is recommended to follow Palo Alto Networks' best practice of restricting User-ID Terminal Server Agent connectivity to trusted internal IP addresses only to minimize exposure. Monitor the vendor advisory for updates on patch availability and apply official fixes once released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- palo_alto
- Date Reserved
- 2025-11-03T20:44:46.432Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4eb690c9d9e3dbe3b6871f
Added to database: 07/08/2026, 20:44:00 UTC
Last enriched: 07/08/2026, 20:58:55 UTC
Last updated: 07/08/2026, 22:31:58 UTC
Views: 4
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