Remote code execution via FileUplink integer wraparound
Published Apr 21, 2026 · Updated Apr 22, 2026
Integer overflow in F Prime before 4.2.0 allows remote attackers to write arbitrary files and execute code on embedded targets via a crafted DataPacket. FileUplink adds attacker-controlled byteOffset and dataSize as U32 values, so wraparound bypasses its file-size check; File.cpp also accepts an unsanitized destination path. A crafted DataPacket therefore reaches an attacker-selected path and offset without authentication, enabling file corruption and code execution.
Summary
What happened
Integer overflow in F Prime before 4.2.0 allows remote attackers to write arbitrary files and execute code on embedded targets via a crafted DataPacket. FileUplink adds attacker-controlled byteOffset and dataSize as U32 values, so wraparound bypasses its file-size check; File.cpp also accepts an unsanitized destination path. A crafted DataPacket therefore reaches an attacker-selected path and offset without authentication, enabling file corruption and code execution.
The record
- CVE
- CVE-2026-41144
- Published
- Apr 21, 2026
- Updated
- Apr 22, 2026
- Vendor
- NASA AMMOS
- Product
- F Prime
- Classifications
- CWE-190, CWE-787, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 21, 2026CVE publishedPublication date reported by the CVE source.
- Apr 22, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 4.2.0
What conditions does exploitation require?
What is affected?
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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