MikroTik RouterOS libjson.so print parse_json_element buffer overflow
Published Sep 25, 2025
8.7
HIGHCVSS 4.0
EPSS 0.78%
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."
Affected products
-
- Version 7StatusaffectedConstraints-
- Version 7.20.1StatusunaffectedConstraints-
- Version 7.21beta2StatusunaffectedConstraints-
- Version
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/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
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
1 other source (NVD) ▾
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:OF/RC:C
1 other source (NVD) ▾
AV:N/AC:L/Au:S/C:C/I:C/A:C
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Sep 25, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.78% (0.00780) | 54.30th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.71% (0.00713) | 48.62th | v5 (v2026.06.15) |
| Sep 26, 2025 | 0.04% (0.00043) | 12.81th | v4 (v2025.03.14) |
References (5)
- https://github.com/a2ure123/libjson-unicode-buffer-overflow-poc exploit
- https://github.com/a2ure123/libjson-unicode-buffer-overflow-poc#technical-proof-of-concept exploit
- https://vuldb.com/?ctiid.325818 signaturepermissions-required
- https://vuldb.com/?id.325818 vdb-entrytechnical-description
- https://vuldb.com/?submit.652387 third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/a2ure123/libjson-unicode-buffer-overflow-poc | exploit | |
| https://github.com/a2ure123/libjson-unicode-buffer-overflow-poc#technical-proof-of-concept | exploit | |
| https://vuldb.com/?ctiid.325818 | signaturepermissions-required | |
| https://vuldb.com/?id.325818 | vdb-entrytechnical-description | |
| https://vuldb.com/?submit.652387 | third-party-advisory |
Change history (0)
No recorded changes yet.