---
title: "CVE-2026-21122: Samsung libsamsungtts.so - Buffer Overflow"
description: "Samsung libsamsungtts.so < SMR Oct-2026 Release 1 contains a buffer overflow caused by out-of-bounds write, letting local attackers execute arbitrary code, exploit requires local access."
url: https://panop.io/threat-heartbeat/CVE-2026-21122/
---

# CVE-2026-21122 Samsung libsamsungtts.so - Buffer Overflow

Samsung libsamsungtts.so < SMR Oct-2026 Release 1 contains a buffer overflow caused by out-of-bounds write, letting local attackers execute arbitrary code, exploit requires local access.

CVSS base score 7.0 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-21122)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/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

Published

12 October 2026

Updated

15 October 2026

Weakness

[CWE-787](https://cwe.mitre.org/data/definitions/787.html)

## Vendor fix

Update to SMR Oct-2026 Release 1 or later.

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-2026-21122](https://nvd.nist.gov/vuln/detail/CVE-2026-21122)
- [https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=10](https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=10)

[← All CVEs](https://panop.io/threat-heartbeat/)

## 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.

[Book a demo](https://panop.io/demo)