External risk intelligence

Samsung Escargot Heap Buffer Overflow

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-25205

Escargot is an open-source library/utility, not a standalone internet-facing service, gateway, or appliance. It is typically integrated as a component within other software or used during development/build processes. As a library, it lacks the standard public-facing deployment patterns of an edge service, making direct internet exposure via this component in common deployments very unlikely.

Buffer Overflow

Samsung Escargot

2026-03-26

Halo Surface Signal: 1 out of 5 — much less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability in Samsung's Escargot, an open-source library, could allow for unauthorized access and manipulation of data if exploited. While the library itself is not typically internet-facing, its integration into other software means potential exposure must be assessed.

Allows unauthorized data access and modification.
Critical flaw in an open-source component.
Confirm relevance and potential exposure.

Attack Path

How an attacker could exploit the issue

An attacker could reach a heap-based buffer overflow in the Escargot component by sending specially crafted data over the network. This vulnerability allows for an out-of-bounds write, which, if successfully triggered, could lead to significant compromise.

No authentication or user interaction needed.
Network input triggers buffer overflow.
Allows full system compromise.

Live Threat

Current exploitation, exposure, and threat context

A heap-based buffer overflow in Samsung Escargot could allow an attacker to write data outside of allocated memory when supported by the advisory. This could potentially impact the integrity and availability of the Escargot component and any systems that integrate it.

System memory may be overwritten.
An attacker could trigger an out-of-bounds write.
Service instability or crashes may occur.

Operational Fix

Recommended remediation, mitigation, and detection steps

This heap-based buffer overflow vulnerability in Samsung Escargot, identified by commit hash 97e8115ab1110bc502b4b5e4a0c689a71520d335, requires careful ownership and triage. Given its nature as an open-source library typically integrated into other software or used in development, platform or application teams integrating Escargot are likely responsible for assessing its presence and risk. The initial practical step involves identifying all deployments where Escargot is used, confirming its reachability and criticality to business operations, and then assigning an owner to coordinate remediation based on the assessed risk.

Platform or application teams own the issue.
Verify Escargot integration and reachability.
Plan remediation based on operational risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is Samsung Escargot?

Samsung Escargot is an open-source library or utility. Developers typically integrate it into larger software projects or use it during build and development processes to handle specific data processing tasks rather than deploying it as a standalone application.

What does heap-based buffer overflow mean for CVE-2026-25205?

This vulnerability is a memory safety issue categorized as CWE-122. It happens when the software writes more data to a specific area of memory (the heap) than it is designed to hold. In this CVE, an attacker can force the program to write data outside its allocated boundaries, which can corrupt system memory and potentially change how the software behaves.

How can an attacker trigger this vulnerability?

An attacker triggers the flaw by sending specially crafted network data to a system using the affected Escargot component. The vulnerability does not require authentication or user interaction to activate. Note that simply having the library installed is not enough; the software must be actively processing malicious input provided over a network connection to cause the overflow.

Is my system exposed to this threat?

Halo Surface Signal indicates that direct internet exposure is very unlikely because Escargot is a library, not a public-facing service or gateway. However, you should still evaluate if any internal applications utilize this component to process network traffic, as those integrations could still represent potential internal reachability.

When should I take action for this CVE?

You should begin by identifying all internal software projects that incorporate this specific version of the Escargot library. Once mapped, assess how these applications handle incoming network data. Your development or platform teams should then prioritize confirming whether their specific integration of the library is reachable and plan updates accordingly.

References

github.com/Samsung/escargot/pull/1554

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.