How severe is CVE-2025-5277?

CVE-2025-5277 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-5277 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-5277?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-5277 have an EU (EUVD) identifier?

Yes. CVE-2025-5277 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16320.

When was CVE-2025-5277 published?

CVE-2025-5277 was published on 2025-05-28 and last updated on 2026-06-17.

CVE-2025-5277

CVE-2025-5277 is a critical-severity vulnerability with a CVSS 3.x base score of 9.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
CVSS v4: 9.4
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-16320
Weakness: CWE-78
Published: 2025-05-28
Last modified: 2026-06-17

Description

aws-mcp-server MCP server is vulnerable to command injection. An attacker can craft a prompt that once accessed by the MCP client will run arbitrary commands on the host system.

Frequently asked questions

What is CVE-2025-5277?: aws-mcp-server MCP server is vulnerable to command injection. An attacker can craft a prompt that once accessed by the MCP client will run arbitrary commands on the host system.
How severe is CVE-2025-5277?: CVE-2025-5277 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-5277 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-5277?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-5277 have an EU (EUVD) identifier?: Yes. CVE-2025-5277 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16320.
When was CVE-2025-5277 published?: CVE-2025-5277 was published on 2025-05-28 and last updated on 2026-06-17.

References

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