5.5

CVE-2026-83949: Microsoft Office Word Information Disclosure Vulnerability

Analyzed
Published 08-09-2026Last modified 14-10-2026

Vulnerability summary

CVE-2026-83949 is a medium (CVSS 5.5) Buffer Over-read vulnerability in microsoft 365_apps. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.7% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.54%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 08-09-2026
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.54%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

Increase +0.14 pp

From 0.40% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft10 products

1 vendor · 10 products

References

1 links