Code execution via unchecked snapshot length
Published Mar 10, 2026 · Updated Mar 10, 2026
Stack-based buffer overflow in Uderzo Software SpaceSniffer 2.0.5.18 allows remote attackers to execute code via a crafted .sns file. The snapshot importer passes an attacker-controlled 32-bit length directly to fread() for a fixed 8192-byte stack buffer without checking the bound. A victim must open or import the file; successful exploitation runs code in that user's context, while malformed files can also crash the application.
Summary
What happened
Stack-based buffer overflow in Uderzo Software SpaceSniffer 2.0.5.18 allows remote attackers to execute code via a crafted .sns file. The snapshot importer passes an attacker-controlled 32-bit length directly to fread() for a fixed 8192-byte stack buffer without checking the bound. A victim must open or import the file; successful exploitation runs code in that user's context, while malformed files can also crash the application.
The record
- CVE
- CVE-2026-26738
- Published
- Mar 10, 2026
- Updated
- Mar 10, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-121, T1204.002, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 10, 2026CVE publishedPublication date reported by the CVE source.
- Mar 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- TIM crafted .sns snapshot proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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