CVE-2026-11879
Local DLL hijack enables code execution in MobaXterm Portable 26.3 during startup.
Is CVE-2026-11879 being exploited?
Not confirmed. CVE-2026-11879 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.11% probability of exploitation in the next 30 days.
How severe is CVE-2026-11879?
CVE-2026-11879 is rated High with a CVSS score of 8.5. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-11879?
Not known from our data. No patch reference has been recorded for CVE-2026-11879, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-11879 affect?
CVE-2026-11879 affects MobaXterm Personal Edition (Portable) 26.3 Build 5154. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-11879?
Update to fixed build when released
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local attacker with access can place a crafted DLL in a predictable temp dir to execute arbitrary code on startup.
Patch when possible
- affected26.3
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.