Vulnerability · CVE-2025-53737
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Published Aug 12, 2025 · catalog updated Feb 26, 2026 · Microsoft Office Online Server
Check this week
CVE-2025-53737 is not in CISA KEV. FIRST estimates a 53.00% chance of exploitation in the next 30 days. Check whether you run Microsoft Office Online Server.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High7.8
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 53.00%
- Remediation
- Not established
- Affected products
- Microsoft Office Online Server
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.
How to fix CVE-2025-53737
Recommended remediation
No required-action text, fix commit, or clear fixed-version range is stored yet.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2025-53737 is not in CISA KEV. FIRST estimates a 53.00% chance of exploitation in the next 30 days. Check whether you run Microsoft Office Online Server.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 53.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
No dated events have been recorded yet.
Sources
Freshness
Last verified in this catalog Feb 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.