CVE-2021-3751
Out-of-bounds Write in bfabiszewski/libmobi
9.6 Critical
libmobi is vulnerable to Out-of-bounds Write
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
1.24%Up 0.6 points since Sep 15, 2021
What each source reports
CVE List Score used
Out-of-bounds Write in bfabiszewski/libmobi
libmobi is vulnerable to Out-of-bounds Write
- Record
CVE-2021-3751- CVSS 3.0
- 9.6 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
EUVDEUVD-2021-27026
libmobi is vulnerable to Out-of-bounds Write
- Record
EUVD-2021-27026- CVSS 3.0
- 9.6 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7g44-2g66-w5fr No score
libmobi is vulnerable to Out-of-bounds Write
libmobi is vulnerable to Out-of-bounds Write
- Record
GHSA-7g44-2g66-w5fr- Weakness
- CWE-787
- Updated
- 2026-11-02
NVD
libmobi is vulnerable to Out-of-bounds Write
- Record
CVE-2021-3751- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.0
- 9.6 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-787
- Updated
- 2026-11-02
OSV
libmobi is vulnerable to Out-of-bounds Write
- Record
CVE-2021-3751- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-2021-3751 is a critical vulnerability (CVSS 9.6) in Bfabiszewski Bfabiszewski/libmobi, published September 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.24%, the 69th percentile. No source names a fixed version.