CVE-2025-29816 Vulnerability Analysis & Exploit Details

CVE-2025-29816
Vulnerability Scoring

7.5
/10
Very High Risk

Highly exploitable, CVE-2025-29816 poses a critical security risk that could lead to severe breaches.

Attack Complexity Details

  • Attack Complexity: High
    Exploits require significant effort and special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical 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-2025-29816 Details

Status: Analyzed

Last updated: 🕟 09 Jul 2025, 16:58 UTC
Originally published on: 🕕 08 Apr 2025, 18:16 UTC

Time between publication and last update: 91 days

CVSS Release: version 3

CVSS3 Source

secure@microsoft.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2025-29816 Vulnerability Summary

CVE-2025-29816: Improper input validation in Microsoft Office Word allows an unauthorized attacker to bypass a security feature over a network.

Assessing the Risk of CVE-2025-29816

Access Complexity Graph

The exploitability of CVE-2025-29816 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-2025-29816

CVE-2025-29816 presents a challenge to exploit due to its high attack complexity, but the absence of privilege requirements still makes it a viable target for skilled attackers. A thorough security review is advised.

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-2025-29816, 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-2025-29816, 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-2025-29816 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2025-29816 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: High
    CVE-2025-29816 can disrupt system operations, potentially causing complete denial of service (DoS).

CVE-2025-29816 References

External References

CWE Common Weakness Enumeration

CWE-349

CAPEC Common Attack Pattern Enumeration and Classification

  • Cache Poisoning CAPEC-141 An attacker exploits the functionality of cache technologies to cause specific data to be cached that aids the attackers' objectives. This describes any attack whereby an attacker places incorrect or harmful material in cache. The targeted cache can be an application's cache (e.g. a web browser cache) or a public cache (e.g. a DNS or ARP cache). Until the cache is refreshed, most applications or clients will treat the corrupted cache value as valid. This can lead to a wide range of exploits including redirecting web browsers towards sites that install malware and repeatedly incorrect calculations based on the incorrect value.
  • DNS Cache Poisoning CAPEC-142 A domain name server translates a domain name (such as www.example.com) into an IP address that Internet hosts use to contact Internet resources. An adversary modifies a public DNS cache to cause certain names to resolve to incorrect addresses that the adversary specifies. The result is that client applications that rely upon the targeted cache for domain name resolution will be directed not to the actual address of the specified domain name but to some other address. Adversaries can use this to herd clients to sites that install malware on the victim's computer or to masquerade as part of a Pharming attack.
  • Manipulating Writeable Configuration Files CAPEC-75 Generally these are manually edited files that are not in the preview of the system administrators, any ability on the attackers' behalf to modify these files, for example in a CVS repository, gives unauthorized access directly to the application, the same as authorized users.

Vulnerable Configurations

  • cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*
    cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*
  • cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:*:*
    cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:*:*
  • cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*
    cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*
  • cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:*:*
    cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:*:*
  • cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
    cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
  • cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:*:*
    cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:*:*
  • cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*
    cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*
  • cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:*:*
    cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:*:*

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