EUVD-2026-77757
GHSA-46jg-fhwv-c6jp
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Router admin credentials (PR:H) and active image import (UI:R) required; host partition writes constitute scope change (S:C); no confidentiality impact; availability low from possible whiteout deletions.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
MikroTik RouterOS before 7.24.2 contains a path traversal vulnerability in the container package OCI/tar image extraction that allows attackers to write files outside the container root by supplying a crafted container image with symlinks pointing to arbitrary paths. Attackers can exploit unsanitized tar member path extraction during container import via /container/add to achieve root-privileged file creation, directory creation, file deletion via overlayfs whiteout, and hardlink creation on the persistent data partition without ever starting the container. The 7.23.x long-term branch does not contain this fix; the container binaries in container-7.23.3.npk and container-7.23.4.npk are byte-identical, and there is no fixed long-term release at the time of publication.
AnalysisAI
Path traversal in MikroTik RouterOS's container package OCI/tar image extraction enables an authenticated administrator to be induced into importing a crafted container image that writes arbitrary files outside the container root onto the device's persistent data partition with root privileges. The vulnerability fires entirely at import time via the /container/add endpoint - the container never needs to start - enabling file creation, deletion via overlayfs whiteout, directory creation, and hardlink creation on the host filesystem. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The container package (container.npk) must be installed and active on the RouterOS device - devices without this optional package have no `/container/add` endpoint and cannot be reached via this vulnerability. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 6.9 (AV:N/AC:L/AT:P/PR:H/UI:P) is a reasonable representation of realistic risk and notably lower than a naive reading of 'root-level file write' would suggest. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade RouterOS to version 7.24.2 or later using the MikroTik update mechanism; the vendor patch and release notes are documented at https://mikrotik.com/supportsec/september-2026-vulnerability. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-59 – Improper Link Resolution Before File Access
View allSame technique Path Traversal
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External POC / Exploit Code
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