CVE-2026-5707Network attack vector

Root command execution via unsanitized session name

Published Apr 6, 2026 · Updated Apr 6, 2026

OS command injection in Research and Engineering Studio on AWS 2025.03 through 2025.12.01 grants remote authenticated users root command execution. When a virtual desktop session is stopped and resumed, RES embeds its user-controlled session name in an SSM command executed on the EC2 host without adequate validation or sanitization. A valid RES account and a crafted session name are required; successful exploitation runs arbitrary commands with root privileges on the virtual desktop host.

CVSS severity8.8
High
EPSS probability0.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Research and Engineering Studio on AWS 2025.03 through 2025.12.01 grants remote authenticated users root command execution. When a virtual desktop session is stopped and resumed, RES embeds its user-controlled session name in an SSM command executed on the EC2 host without adequate validation or sanitization. A valid RES account and a crafted session name are required; successful exploitation runs arbitrary commands with root privileges on the virtual desktop host.

The record

CVE
CVE-2026-5707
Published
Apr 6, 2026
Updated
Apr 6, 2026
Vendor
Amazon Web Services
Product
Research and Engineering Studio on AWS
Classifications
CWE-78, CAPEC-88, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2025.03 <=2025.12.01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Amazon Web Services · Research and Engineering Studio on AWSversion=2025.03 <=2025.12.01

Published CVSS scores

8.8Amazon Web ServicesCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7Amazon Web ServicesCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CAPEC-88OS Command Injection
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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