Microsoft Office RCE flaw CVE-2026-62870
A remote code execution vulnerability in Microsoft Office and Excel products has been disclosed by CERT-FR with a Microsoft patch available.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
CERT-FR issued an advisory regarding CVE-2026-62870, a remote code execution vulnerability affecting multiple Microsoft Office products, including Microsoft 365 Apps for Enterprise, Microsoft Excel 2016, Office 2019, and Office LTSC 2021/2024 across both 32-bit and 64-bit editions. The vulnerability could allow an attacker to execute arbitrary code on affected systems.
No evidence of active exploitation is mentioned in the advisory. Microsoft has published a security bulletin with corrective patches, and CERT-FR recommends organizations apply the vendor-provided fixes to remediate the vulnerability across all affected Office product lines.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0961
Free public brief. Slack alerts on the vendors you run come with the paid plans, and a new account gets three days of them, no card.
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. In the app the same report carries live profiles of the CVEs it names. The paid plans add the security research and news reporting the free tier leaves out.
It sits in a corpus of 16,445 reports from 149 sources, 666 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Slack alerts are a paid-plan feature: name the vendors you run and Slack hears about the reports that touch them, not the rest of the week's. Nothing is charged unless you subscribe.
Create a free account What it costs