CVE-2020-1581
An elevation of privilege vulnerability exists in the way that Microsoft Office Click-to-Run (C2R) components handle objects in memory.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.72%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An elevation of privilege vulnerability exists in the way that Microsoft Office Click-to-Run (C2R) components handle objects in memory. An attacker who successfully exploited the vulnerability could elevate privileges. The attacker would need to already have the ability to execute code on the system. An attacker could exploit this vulnerability by running a specially crafted application on the victim system. The security update addresses the vulnerability by correcting how Microsoft Office Click-to-Run (C2R) components handle objects in memory.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 3.72% probability · 90th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- microsoft/365 apps · microsoft/office
- Source
- secure@microsoft.com
EPSS 3.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1581Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1581Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.