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CVE-2026-0288 is a high-severity vulnerability in Palo Alto Networks PAN-OS caused by multiple buffer overflow flaws in the User-ID Terminal Server Agent (TSA) component. The issue affects PAN-OS deployments where at least one Terminal Server Agent entry is configured. An unauthenticated attacker with network access to the TSA service can send specially crafted network traffic to trigger memory corruption in the vulnerable component, resulting in a denial-of-service condition and potentially arbitrary code execution. Panorama and Cloud NGFW on AWS are not affected.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A PAN-OS User-ID TSA vulnerability that allows unauthenticated denial of service and possible code execution.
A high-severity PAN-OS vulnerability involving multiple buffer overflows that can allow an unauthenticated network attacker to cause denial of service and potentially achieve arbitrary code execution against Palo Alto firewalls.
A high-severity unauthenticated remote code execution or denial-of-service vulnerability in the User-ID Terminal Server Agent (TSA) component of Palo Alto Networks PAN-OS, caused by multiple buffer overflows reachable via specially crafted network traffic.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.