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CVE-2025-55243

25
FAUCET Score

CVE-2025-55243 is a high-severity information exposure vulnerability affecting Microsoft Office Plus, enabling an unauthorized attacker to perform network spoofing. With a CVSS score of 7.5, this vulnerability is easily exploitable over a network without user interaction, potentially leading to the disclosure of sensitive information. While not currently listed on the KEV catalog or having public exploit code, its high FAUCET Risk Score of 72/100 and mentions in community discussions and media coverage suggest it warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.10.0.26585CPE matchmatch criteria
cpe:2.3:a:microsoft:officeplus:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.04%
Probability of exploitation in next 30 days
EPSS Percentile
60.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0104 is in the 37th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: Microsoft OfficePLUSFixed in: 3.10.0.26585
View patch
microsoftvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2025-Sep/CVE-2025-55243Important

Microsoft OfficePlus Spoofing Vulnerability

Sep 9, 2025

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2025-55243
Vendor Advisory