---
title: "CVE-2026-58839: MountRegistry - Buffer Overflow"
description: "MountRegistry contains a buffer overflow caused by out of bounds read in forEachLine function, letting local attackers escalate privileges without additional execution rights, exploit requires no user interaction."
url: https://panop.io/threat-heartbeat/CVE-2026-58839/
---

# CVE-2026-58839 MountRegistry - Buffer Overflow

MountRegistry contains a buffer overflow caused by out of bounds read in forEachLine function, letting local attackers escalate privileges without additional execution rights, exploit requires no user interaction.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.10% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-58839)

## Details

Type

Buffer Overflow

Impact

Privilege Escalation

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

8 September 2026

Updated

15 October 2026

Weakness

[CWE-120](https://cwe.mitre.org/data/definitions/120.html)

## Vendor fix

Update to the latest version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-58839](https://nvd.nist.gov/vuln/detail/CVE-2026-58839)
- [https://source.android.com/docs/security/bulletin/2026/2026-09-01](https://source.android.com/docs/security/bulletin/2026/2026-09-01)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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