Is CVE-2026-5709 in the CISA KEV catalog?

No. CVE-2026-5709 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-5709?

CVE-2026-5709 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2026-5709?

CVE-2026-5709 has an EPSS score of 1.09% (61th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2026-5709

HIGH

8.8

CVSS v3

NVD

Description

Unsanitized input in the FileBrowser API in AWS Research and Engineering Studio (RES) version 2024.10 through 2025.12.01 might allow a remote authenticated actor to execute arbitrary commands on the cluster-manager EC2 instance via crafted input when using the FileBrowser functionality. To remediate this issue, users are advised to upgrade to RES version 2026.03 or apply the corresponding mitigation patch to their existing environment.

CWE-78OS Command Injection

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.09%probability of exploitation in 30 days

61stpercentile

Moderate risk: more likely to be exploited than 61% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-10.