Exploited vulnerabilities / CVE-2026-34926
Confirmed exploited · path traversal · Trend Micro Apex OneCVE-2026-34926
Trend Micro Apex One path traversal, confirmed exploited in the wild.
Trend Micro Apex One (on-premise) contains a directory traversal vulnerability that could allow a pre-authenticated local attacker to modify a key table on the server to inject malicious code to deploy to agents on affected installations.
| CISA's name for it | Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability |
|---|---|
| Vendor and product | Trend Micro · Apex One |
| Type | path traversal · CWE-23 |
| Exploited | Confirmed by CISA listed 21 May 2026 |
| Likelihood | one of the most likely to be exploited of every vulnerability tracked |
| Deadline | 4 June 2026 · already passed |
| Used in ransomware | Not reported |
| Advisories | success.trendmicro.com ↗ · nvd.nist.gov ↗ |
Three steps, in this order
Apply the vendor fix.
Assume files readable through the flaw were read: rotate secrets and keys stored on the system.
Restrict access to the interface until patched.
| CISA's required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
|---|
Know before someone else finds it
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CVE-2026-34926 in short
Is CVE-2026-34926 being exploited?
Yes. CISA added CVE-2026-34926 to its Known Exploited Vulnerabilities catalogue on 21 May 2026, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2026-34926?
US federal agencies must remediate it by 4 June 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2026-34926 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 13%, the 96th percentile of every CVE it scores.
How do I fix CVE-2026-34926?
Apply the vendor fix. Assume files readable through the flaw were read: rotate secrets and keys stored on the system. Restrict access to the interface until patched.
Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.