Microsoft Outlook and Word Remote Code Execution Vulnerability

published 2026-06-09 5 mo ago modified 2026-09-24 45 d ago also EUVD-2026-35508

cvss: 8.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits: 0; none known

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

Patch / fix

links 1

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47635 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 5 mo ago (2026-06-10)

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.4	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA	3.1	8.4	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Microsoft Office LTSC 2024

Classification

Weakness

CWE-122 Heap-based Buffer Overflow

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2026-47635
vendor-advisory, patch

Sources

CVE List CVE-2026-47635
NVD CVE-2026-47635

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary