CVE-2021-45946
Wasm3 0.5.0 has an out-of-bounds write in CompileBlock (called from Compile_LoopOrBlock and...
Wasm3 0.5.0 has an out-of-bounds write in CompileBlock (called from Compile_LoopOrBlock and CompileBlockStatements).
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Wasm3 0.5.0 has an out-of-bounds write in CompileBlock (called from Compile_LoopOrBlock and CompileBlockStatements).
- Record
CVE-2021-45946- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-787
- Updated
- 2026-11-02
CVE List No score
Wasm3 0.5.0 has an out-of-bounds write in CompileBlock (called from Compile_LoopOrBlock and CompileBlockStatements).
- Record
CVE-2021-45946- Updated
- 2026-11-02
EUVDEUVD-2021-32654 No score
Wasm3 0.5.0 has an out-of-bounds write in CompileBlock (called from Compile_LoopOrBlock and CompileBlockStatements).
- Record
EUVD-2021-32654- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4xcp-j3r2-q52p No score
Wasm3 0.5.0 has an out-of-bounds write in CompileBlock (called from Compile_LoopOrBlock and...
Wasm3 0.5.0 has an out-of-bounds write in CompileBlock (called from Compile_LoopOrBlock and CompileBlockStatements).
- Record
GHSA-4xcp-j3r2-q52p- Weakness
- CWE-787
- Updated
- 2026-11-02
OSV
Wasm3 0.5.0 has an out-of-bounds write in CompileBlock (called from Compile_LoopOrBlock and CompileBlockStatements).
- Record
CVE-2021-45946- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-45946 is a medium vulnerability (CVSS 5.5) in Wasm3 Project Wasm3, published December 31, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.69%, the 52nd percentile. No source names a fixed version.