Affects widely used Microsoft Word; use-after-free enables local code execution via crafted documents.
CVE-2026-33115
Use-after-free in MS Word enables local code execution via crafted docs.
Is CVE-2026-33115 being exploited?
Not confirmed. CVE-2026-33115 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 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-33115?
CVE-2026-33115 is rated High with a CVSS score of 8.4. 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-2026-33115?
Yes. A fix has been recorded for CVE-2026-33115. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-33115 affect?
CVE-2026-33115 affects Microsoft Word, Microsoft Office. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33115?
Apply Office/Word update; enable automatic updates
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local code execution on the victim's machine via crafted Word document.
Patch when possible
- affected>= 16.0.1 and < https://aka.ms/OfficeSecurityReleases
- affected>= 16.0.1 and < https://aka.ms/OfficeSecurityReleases
- affected>= 16.0.0 and < https://aka.ms/OfficeSecurityReleases
- affected>= 16.0.1 and < 16.108.26041219
- affected>= 16.0.0 and < 16.108.26041219
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.