This article draws on reporting originally published at theweek.com (2017) and references security research from RedLock and commentary from InfoWorld, Lifewire, and Bloomberg BNA. Some statistics are dated; see review notes.
Why Cloud Security Matters More Than Ever
Cloud storage and cloud computing have become foundational to how modern businesses operate. Organizations rely on the cloud for everything from photo and document storage to payroll processing, SaaS tooling, and cross-team collaboration—all running on shared, remote networks of servers.
That concentration of sensitive data in shared infrastructure makes cloud environments a high-value target for attackers. Research from the RedLock Cloud Security Trends report found that the vast majority of organizations were not doing enough to protect their cloud environments at the time of publication—a finding that remains relevant as cloud footprints continue to expand.
Understanding what attackers are after, how they get in, and what your team can do about it is the first step toward a defensible cloud posture.
The Main Threats to Cloud Data
Data Breaches
The classic threat is a data breach—unauthorized access to data stored in the cloud. This can include personally identifiable information (PII), payment card data, health records, trade secrets, and intellectual property. As security reporter Fahmida Y. Rashid noted in an InfoWorld analysis of cloud security threats, breaches involving health information or IP can be particularly devastating. The severity of the damage ultimately depends on the sensitivity of the exposed data.
Account Hijacking
Once attackers gain a foothold, they may hijack legitimate user or administrator accounts entirely. From that position, they can eavesdrop on activity, manipulate transactions, modify or delete data, or use the compromised account to pivot and launch further attacks against other systems.
A particularly stealthy variant of this is the Advanced Persistent Threat (APT)—a long-running intrusion in which attackers quietly establish a presence inside a system and slowly exfiltrate data over an extended period before being detected.
Payroll and Financial Data Exposure
Many organizations use cloud-based payroll platforms. A successful breach of a payroll service can expose employee Social Security numbers, bank account details, salary information, and tax data—a rich target for identity theft and financial fraud. Payroll data breaches can also carry significant regulatory liability depending on jurisdiction.
How Attackers Get In
Compromised Credentials and Weak Authentication
Stolen or weak credentials remain one of the most common entry points into cloud environments. If an attacker obtains valid login credentials—through phishing, credential stuffing, or purchasing leaked passwords—they can operate as a legitimate user and go undetected for a long time. RedLock researchers found that administrative accounts in a significant percentage of public cloud environments showed signs of potential compromise, underscoring how frequently this vector is exploited.
Flaws in authentication systems themselves—such as misconfigured identity providers, overly permissive IAM roles, or missing multi-factor authentication (MFA)—compound the problem.
Misconfigured Storage and Services
Misconfiguration is one of the leading causes of cloud data exposure. When organizations move workloads to the cloud, shared infrastructure means that memory, databases, and services run in close proximity to those of other tenants. A single misconfigured access control on a storage bucket—such as an Amazon S3 bucket left publicly readable—can expose gigabytes of sensitive data instantly.
The RedLock report found that more than half of organizations using cloud storage services had inadvertently left one or more services exposed due to misconfiguration. This is a preventable class of vulnerability, but it requires rigorous configuration reviews and automated policy enforcement to catch reliably.
Mobile Device Risk
A large proportion of employees access corporate cloud accounts from personal mobile devices. As Priya Viswanathan noted at Lifewire, this introduces a mobile security hazard: the security of any cloud interaction is only as strong as the weakest link in the chain—the device itself, the network connection, and how the user handles their credentials.
Unmanaged personal devices may lack endpoint security controls, run outdated operating systems, connect over untrusted Wi-Fi, or store credentials insecurely—each of which creates an opening for attackers.
How to Reduce Your Cloud Security Risk
No single control eliminates cloud risk, but a layered approach significantly reduces your attack surface. The following practices address the threat categories described above:
- Enforce multi-factor authentication (MFA) on all cloud accounts, especially administrative ones. MFA is the single most effective control against credential-based attacks.
- Apply the principle of least privilege. Users, services, and roles should have only the permissions they actually need. Audit IAM policies regularly and remove unused permissions.
- Audit storage configurations continuously. Use your cloud provider’s native tools (such as AWS Config, Azure Policy, or Google Cloud Security Command Center) or a third-party Cloud Security Posture Management (CSPM) tool to detect and alert on publicly exposed buckets, databases, or services.
- Encrypt data at rest and in transit. Ensure that sensitive data is encrypted using strong, current algorithms, and that encryption keys are managed securely—not stored alongside the data they protect.
- Implement a Mobile Device Management (MDM) policy. For organizations where employees access cloud resources from personal devices, MDM solutions can enforce minimum security baselines—screen locks, OS patching, remote wipe capability—before granting access.
- Monitor for anomalous behavior. Cloud-native logging (AWS CloudTrail, Azure Monitor, GCP Cloud Audit Logs) combined with a SIEM or threat detection platform can surface unusual access patterns—such as logins from unexpected locations or bulk data downloads—that may indicate a compromise.
- Patch and update dependencies promptly. Application-level vulnerabilities in code running on cloud infrastructure are a real attack surface. Keep runtimes, libraries, and container base images updated.
- Train employees on phishing awareness. Since credential theft often starts with a phishing email, regular security awareness training reduces the likelihood that an employee will hand over their credentials.
The Bottom Line
Cloud environments offer enormous operational benefits, but they also concentrate sensitive data in ways that attract sophisticated attackers. The threats—data breaches, account hijacking, APTs, misconfigured services, and mobile vulnerabilities—are well understood. What varies between organizations is whether they treat cloud security as an ongoing operational discipline or an afterthought.
The good news is that the most common attack vectors are preventable with consistent application of foundational controls: strong authentication, least-privilege access, continuous configuration auditing, encryption, and security monitoring. Starting with these basics will eliminate the majority of your cloud risk exposure.