# CVE-2025-10948: MikroTik RouterOS libjson.so print parse_json_element buffer overflow

> Remote attackers can trigger a buffer overflow in RouterOS JSON parsing, potentially leading to code execution or service disruption.

- **Severity:** High 8.7 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Sep 2025
- **Updated:** 13 Oct 2025
- **Also known as:** GHSA-xfr2-wmjg-pmwj

## What is CVE-2025-10948?

CVE-2025-10948 is a high-severity memory corruption vulnerability in MikroTik RouterOS, published on 25 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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."

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-10948?


## How do I fix CVE-2025-10948?

No fix has been published for CVE-2025-10948 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-10948 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-10948 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-10948 and fix it if it is affected.

What it is: CVE-2025-10948 is a high-severity memory corruption vulnerability in MikroTik RouterOS, published on 25 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-10948 exists.

Affected product: MikroTik RouterOS. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-10948/ (Markdown: https://insights.sbomify.com/CVE-2025-10948/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-10948
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-10948
- OSV: https://osv.dev/vulnerability/CVE-2025-10948

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-10948/
Summaries are generated and may contain mistakes; the official description above is the record.