AWS Addresses Critical RCE and Privilege Escalation Flaws in RES

Severity: High (Score: 72.0)

Sources: Gbhackers, Cybersecuritynews

Summary

AWS has issued a security bulletin on April 10, 2026, regarding three severe vulnerabilities in its Research and Engineering Studio (RES). These vulnerabilities, identified as CVEs, allow authenticated attackers to execute arbitrary commands and escalate privileges, potentially compromising cloud environments. The flaws stem from unsanitized inputs and improper access controls, affecting RES versions 2025.12.01 and earlier. If exploited, attackers could gain root access to EC2 instances and virtual desktop hosts, leading to data theft and unauthorized resource usage. AWS has released version 2026.03 to patch these vulnerabilities and recommends immediate upgrades. Temporary manual patches are also available for those unable to upgrade immediately. Security teams are urged to follow mitigation instructions provided on AWS's GitHub repository. Key Points: • Three severe vulnerabilities in AWS RES could allow RCE and privilege escalation. • Affected versions are RES 2025.12.01 and earlier; upgrade to 2026.03 is crucial. • Authenticated attackers can exploit these flaws, posing significant risks to cloud environments.

Key Entities

• Amazon Web Services (company)
• Research And Engineering Studio (platform)