CVE-2026-55050 Vulnerability Analysis & Exploit Details

CVE-2026-55050
Vulnerability Scoring

5.5

/10

Significant Risk

Security assessments indicate that CVE-2026-55050 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

Attack Complexity: Low
Exploits can be performed without significant complexity or special conditions.
Attack Vector: Local
Vulnerability requires local system access.
Privileges Required: None
No privileges are required for exploitation.
Scope: Unchanged
Exploit remains within the originally vulnerable component.
User Interaction: Required
User interaction is necessary for successful exploitation.

CVE-2026-55050 Details

Status: Analyzed

Last updated: 🕒 16 Jul 2026, 15:16 UTC
Originally published on: 🕕 14 Jul 2026, 18:18 UTC

Time between publication and last update: 1 days

CVSS Release: version 3

CVSS3 Source

secure@microsoft.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2026-55050 Vulnerability Summary

CVE-2026-55050: Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.

Assessing the Risk of CVE-2026-55050

Access Complexity Graph

The exploitability of CVE-2026-55050 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-55050

With low attack complexity and no required privileges, CVE-2026-55050 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-55050, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-55050, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Confidentiality: High
Exploiting CVE-2026-55050 can result in unauthorized access to sensitive data, severely compromising data privacy.
Integrity: None
CVE-2026-55050 poses no threat to data integrity.
Availability: None
CVE-2026-55050 does not impact system availability.

CVE-2026-55050 References

External References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55050

CWE Common Weakness Enumeration

CWE-125

CAPEC Common Attack Pattern Enumeration and Classification

Overread Buffers CAPEC-540 An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Vulnerable Configurations

cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*
cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*
cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*
cpe:2.3:a:microsoft:office_online_server:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:1.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:1.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10410.20003:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10410.20003:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10414.20000:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10414.20000:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10416.20047:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10416.20047:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10416.20058:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10416.20058:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20027:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20027:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20047:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20047:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20059:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20059:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20068:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20068:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20075:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20075:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20113:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:16.0.10417.20113:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:-:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:-:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:-:language_pack:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:-:language_pack:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.10417.20003:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.10417.20003:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.17328.20246:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.17328.20246:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.17328.20292:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.17328.20292:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.17328.20362:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.17328.20362:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.17928.20356:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.17928.20356:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.17928.20396:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.17928.20396:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20172:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20172:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20286:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20286:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20396:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20396:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20424:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20424:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20508:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20508:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20518:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.18526.20518:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.19127.20100:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.19127.20100:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.19127.20262:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.19127.20262:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.19127.20338:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.19127.20338:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.19127.20378:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.19127.20378:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.19127.20442:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:16.0.19127.20442:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x86:*

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