Description

Insufficiently protected credentials in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.5",
  "pubDate": "2026-08-11T17:18:37.453Z",
  "pubdate": "2026-08-11T17:18:37.453Z",
  "executiveSummary": "This vulnerability involves insufficiently protected credentials within Microsoft Office SharePoint, exposing the platform to spoofing attacks conducted across a network. An authorized attacker capable of network access can leverage these inadequately secured credentials to masquerade as legitimate entities or services, thereby compromising the integrity and authenticity of network communications within the SharePoint environment. The primary impact of successful exploitation includes unauthorized spoofing capabilities, which can facilitate further network-based attacks, unauthorized access to sensitive workflows, or manipulation of trusted data channels. Exploitation requires the attacker to possess authorization within the system, alongside network connectivity to the vulnerable Microsoft Office SharePoint instance. The inherent risk lies in the potential erosion of trust boundaries and the facilitation of lateral movement or unauthorized communications by malicious actors who have attained baseline access to the affected infrastructure. Security teams must address credential handling mechanisms within the application architecture to mitigate the underlying exposure and prevent unauthorized credential exploitation or interception scenarios.",
  "technicalDetails": "The root cause of this vulnerability stems from the insufficient protection of credentials utilized within Microsoft Office SharePoint. When credentials are inadequately safeguarded during storage, transmission, or internal processing, they become susceptible to compromise or unauthorized reuse by entities operating within the network boundary. The vulnerable component resides within the credential management and authentication subsystems of Microsoft Office SharePoint.\nExploitation of this vulnerability requires the attacker to be an authorized user with network access to the target SharePoint deployment. By leveraging the insufficiently protected credentials, an attacker can extract, intercept, or replay authentication artifacts or sensitive tokens associated with the SharePoint environment. The step-by-step attack flow typically involves the attacker identifying endpoints or internal communication channels where credentials are exposed or weakly protected. Subsequently, the attacker captures or derives the necessary credential data due to the lack of robust encryption, proper obfuscation, or strict access controls. Armed with these credentials, the attacker crafts forged requests or impersonates legitimate system components or users, achieving network-based spoofing.\nThe network exposure vector is active over the network, meaning any adversary with network connectivity and the requisite authorization can initiate the attack sequence. Privilege requirements dictate that the attacker must already possess authorized status within the environment, lowering the barrier for insider threats or compromised low-privileged accounts to escalate their capabilities. The payload behavior centers on identity deception, allowing the malicious actor to inject falsified data streams or impersonate trusted entities. Post-exploitation impact encompasses unauthorized data access, manipulation of SharePoint services, disruption of authenticated sessions, and potential facilitation of advanced persistent threats by blending malicious traffic with legitimate administrative or user interactions."
}