CVE-2025-57851 | Red Hat Multicluster Engine for Kubernetes default permission

VDB-356238 · CVE-2025-57851 · GCVE-0-2025-57851 RED HAT MULTICLUSTER ENGINE FOR KUBERNETES DEFAULT PERMISSION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.4 $5k-$25k 1.25+ Summaryinfo A vulnerability categorized as critical has been discovered in Red Hat Multicluster Engine for Kubernetes. This vulnerability affects unknown code. The manipulation results in default permission. This vulnerability was named CVE-2025-57851. The attack needs to be approached locally. There is no available exploit. Detailsinfo A vulnerability classified as critical has been found in Red Hat Multicluster Engine for Kubernetes (affected version unknown). Affected is an unknown functionality. The manipulation with an unknown input leads to a default permission vulnerability. CWE is classifying the issue as CWE-276. During installation, installed file permissions are set to allow anyone to modify those files. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes: A container privilege escalation flaw was found in certain Multicluster Engine for Kubernetes 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. The advisory is available at access.redhat.com. This vulnerability is traded as CVE-2025-57851 since 08/21/2025. The exploitability is told to be difficult. Local access is required to approach this attack. Additional levels of successful authentication are necessary for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 04/08/2026). This vulnerability is assigned to T1222 by the MITRE ATT&CK project. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type Virtualization Software Vendor Red Hat Name Multicluster Engine for Kubernetes License open-source Website Vendor: https://www.redhat.com/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.4 VulDB Meta Temp Score: 6.4 VulDB Base Score: 6.4 VulDB Temp Score: 6.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.4 CNA Vector (redhat): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Default permission CWE: CWE-276 / CWE-266 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 08/21/2025 CVE reserved 04/08/2026 +230 days Advisory disclosed 04/08/2026 +0 days VulDB entry created 04/08/2026 +0 days VulDB entry last update Sourcesinfo Vendor: redhat.com Advisory: access.redhat.com Status: Confirmed CVE: CVE-2025-57851 (🔒) GCVE (CVE): GCVE-0-2025-57851 GCVE (VulDB): GCVE-100-356238 Entryinfo Created: 04/08/2026 16:30 Changes: 04/08/2026 16:30 (61) Complete: 🔍 Cache ID: 99:5CC:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸