How severe is CVE-2025-57849?

CVE-2025-57849 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-57849 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-57849?

CVE-2025-57849 affects Redhat Fuse. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-57849?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-57849 have an EU (EUVD) identifier?

Yes. CVE-2025-57849 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208627.

When was CVE-2025-57849 published?

CVE-2025-57849 was published on 2026-03-13 and last updated on 2026-06-17.

CVE-2025-57849

CVE-2025-57849 is a medium-severity vulnerability in Redhat Fuse with a CVSS 3.x base score of 6.4. 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-276.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-208627
Weakness: CWE-276
Affected product: Redhat Fuse
Published: 2026-03-13
Last modified: 2026-06-17

Description

A container privilege escalation flaw was found in certain Fuse images. This issue stems from the /etc/passwd file being created with group-writable permissions during build time. In certain conditions, an attacker who can execute commands within an affected container, even as a non-root user, can leverage their membership in the root group to modify the /etc/passwd file. This could allow the attacker to add a new user with any arbitrary UID, including UID 0, leading to full root privileges within the container.

Frequently asked questions

What is CVE-2025-57849?: A container privilege escalation flaw was found in certain Fuse images. This issue stems from the /etc/passwd file being created with group-writable permissions during build time. In certain conditions, an attacker who can execute commands within an affected container, even as a non-root user, can leverage their membership in the root group to modify the /etc/passwd file. This could allow the attacker to add a new user with any arbitrary UID, including UID 0, leading to full root privileges within the container.
How severe is CVE-2025-57849?: CVE-2025-57849 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-57849 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-57849?: CVE-2025-57849 affects Redhat Fuse. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-57849?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-57849 have an EU (EUVD) identifier?: Yes. CVE-2025-57849 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208627.
When was CVE-2025-57849 published?: CVE-2025-57849 was published on 2026-03-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redhat:fuse:7.0.0:*:*:*:*:*:*:*

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