CVE-2026-26738

High

Published: 10 March 2026

Published

10 March 2026

Modified

01 April 2026

KEV Added

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Patch

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CVSS Score 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Score 0.0008 22.4th percentile

Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-26738 is a high-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Gruppotim (inferred from references). Its CVSS base score is 7.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 22.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploitation for Client Execution (T1203) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match

prevent

Requires timely identification, reporting, testing, and installation of software updates to remediate the specific buffer overflow vulnerability in SpaceSniffer.

SI-16 Memory Protection good match

prevent

Implements memory protections such as DEP and ASLR to prevent arbitrary code execution from buffer overflow exploits in vulnerable applications like SpaceSniffer.

SI-3 Malicious Code Protection good match

preventdetect

Deploys malicious code protection scanning files in real-time upon opening to detect and block crafted .sns snapshot files exploiting the buffer overflow.

MITRE ATT&CK Enterprise TechniquesAI

T1203 Exploitation for Client Execution Execution

Adversaries may exploit software vulnerabilities in client applications to execute code.

attack.mitre.org →

T1204.002 Malicious File Execution

An adversary may rely upon a user opening a malicious file in order to gain execution.

attack.mitre.org →

Why these techniques?

Buffer overflow in client-side app enables arbitrary code execution via crafted file opened by user (T1204.002); directly matches exploitation of client software vulnerability for code execution (T1203).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

Buffer Overflow vulnerability in Uderzo Software SpaceSniffer v.2.0.5.18 allows a remote attacker to execute arbitrary code via a crafted .sns snapshot file.

Deeper analysisAI

CVE-2026-26738 is a buffer overflow vulnerability (CWE-121) affecting Uderzo Software SpaceSniffer version 2.0.5.18. Published on 2026-03-10, it carries a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). The flaw enables a remote attacker to execute arbitrary code by convincing a user to open a crafted .sns snapshot file within the application.

Exploitation requires local access to the target system (AV:L) and low complexity (AC:L), with no privileges needed (PR:N) but user interaction required (UI:R), such as opening the malicious file. Successful exploitation grants high-impact confidentiality, integrity, and availability effects (C:H/I:H/A:H) without changing scope (S:U), potentially allowing arbitrary code execution in the context of the affected application.