Excel vulnerabilities: known CVEs & security history
Microsoft · Actively exploited · 41 tracked CVEs · 0 actively exploited · updated August 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Excel release lines — 41 in total. A CVE here doesn't mean your version is affected — check Excel's current status and the safe version to run.
Known Excel CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2026-44822 | high | 8.2 | 1% | 2026 |
| CVE-2026-55949 | high | 7.8 | 0% | 2026 |
| CVE-2026-55947 | high | 7.8 | 0% | 2026 |
| CVE-2026-55141 | high | 7.8 | 0% | 2026 |
| CVE-2026-55137 | high | 7.8 | 0% | 2026 |
| CVE-2026-55136 | high | 7.8 | 0% | 2026 |
| CVE-2026-55131 | high | 7.8 | 0% | 2026 |
| CVE-2026-55058 | high | 7.8 | 0% | 2026 |
| CVE-2026-55053 | high | 7.8 | 0% | 2026 |
| CVE-2026-55048 | high | 7.8 | 0% | 2026 |
| CVE-2026-55044 | high | 7.8 | 0% | 2026 |
| CVE-2026-55041 | high | 7.8 | 0% | 2026 |
| CVE-2026-55039 | high | 7.8 | 0% | 2026 |
| CVE-2026-55037 | high | 7.8 | 0% | 2026 |
| CVE-2026-55036 | high | 7.8 | 0% | 2026 |
| CVE-2026-55031 | high | 7.8 | 0% | 2026 |
| CVE-2026-55029 | high | 7.8 | 0% | 2026 |
| CVE-2026-55025 | high | 7.8 | 0% | 2026 |
| CVE-2026-55024 | high | 7.8 | 0% | 2026 |
| CVE-2026-58618 | high | 7.8 | 0% | 2026 |
| CVE-2026-55948 | high | 7.8 | 0% | 2026 |
| CVE-2026-55899 | high | 7.8 | 0% | 2026 |
| CVE-2026-50675 | high | 7.8 | 0% | 2026 |
| CVE-2026-45469 | high | 7.8 | 0% | 2026 |
| CVE-2026-44823 | high | 7.8 | 0% | 2026 |
| CVE-2026-44820 | high | 7.8 | 0% | 2026 |
| CVE-2026-44817 | high | 7.8 | 0% | 2026 |
| CVE-2026-44812 | high | 7.8 | 0% | 2026 |
| CVE-2026-44803 | high | 7.8 | 0% | 2026 |
| CVE-2026-55122 | high | 7.1 | 0% | 2026 |
| CVE-2026-45649 | high | 7.1 | 0% | 2026 |
| CVE-2026-44818 | high | 7 | 0% | 2026 |
| CVE-2026-50678 | medium | 6.6 | 0% | 2026 |
| CVE-2026-55054 | medium | 6.5 | 1% | 2026 |
| CVE-2026-55898 | medium | 6.1 | 0% | 2026 |
| CVE-2026-54988 | medium | 6.1 | 0% | 2026 |
| CVE-2026-55138 | medium | 5.5 | 0% | 2026 |
| CVE-2026-55046 | medium | 5.5 | 0% | 2026 |
| CVE-2026-50408 | medium | 5.5 | 0% | 2026 |
| CVE-2026-48580 | medium | 5.5 | 0% | 2026 |
| CVE-2026-45455 | low | 3.3 | 1% | 2026 |
Is my Excel version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Excel version → · Monitor Excel for new CVEs →
Excel vulnerabilities — frequently asked
How many known vulnerabilities does Excel have?
IsItPatched tracks 41 CVEs for Excel. 0 are critical-severity and 32 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Excel have any actively-exploited vulnerabilities?
None of Excel's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Excel vulnerability?
Among tracked issues, CVE-2026-44822 (HIGH, CVSS 8.2) ranks highest — a Out-of-bounds read weakness.
Is Excel safe to use?
It depends on the version. The latest supported Excel release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Excel security status · Excel end-of-life · actively-exploited CVEs. Always verify against Microsoft's advisories — see our disclaimer.