Description
A vulnerability has been found in MikroTik RouterOS 7. This affects the function parse_json_element of the file /rest/ip/address/print of the component libjson.so. The manipulation leads to buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 7.20.1 and 7.21beta2 mitigates this issue. You should upgrade the affected component. The vendor replied: "Our bug tracker reports that your issue has been fixed. This means that we plan to release a RouterOS update with this fix. Make sure to upgrade to the next release when it comes out."
References (5)
Core 5
Core References
Permissions Required, VDB Entry vdb-entry
technical-description
https://vuldb.com/?id.325818
Permissions Required, VDB Entry signature
permissions-required
https://vuldb.com/?ctiid.325818
Permissions Required, VDB Entry third-party-advisory
https://vuldb.com/?submit.652387
Various Sources exploit
https://github.com/a2ure123/libjson-unicode-buffer-overflow-poc
Scores
CVSS v3
8.8
EPSS
0.0023
EPSS Percentile
45.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-119
CWE-120
Status
published
Products (3)
MikroTik/RouterOS
7
MikroTik/RouterOS
7.20.1
MikroTik/RouterOS
7.21beta2
Published
Sep 25, 2025
Tracked Since
Feb 18, 2026