CVE-2020-10941
Arm Mbed TLS before 2.6.15 allows attackers to obtain sensitive information (an RSA private key)...
Arm Mbed TLS before 2.16.5 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Arm Mbed TLS before 2.16.5 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.
- Record
CVE-2020-10941- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
CVE List No score
Arm Mbed TLS before 2.16.5 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.
- Record
CVE-2020-10941- Updated
- 2026-11-02
EUVDEUVD-2020-3346 No score
Arm Mbed TLS before 2.16.5 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.
- Record
EUVD-2020-3346- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3qrr-m24q-j9qm
Arm Mbed TLS before 2.6.15 allows attackers to obtain sensitive information (an RSA private key)...
Arm Mbed TLS before 2.6.15 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.
- Record
GHSA-3qrr-m24q-j9qm- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-311
- Updated
- 2026-11-02
OSV
Arm Mbed TLS before 2.16.5 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.
- Record
CVE-2020-10941- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-10941
Arm Mbed TLS before 2.16.5 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.
- Record
DEBIAN-CVE-2020-10941- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVJLSEC-2025-200
Arm Mbed TLS before 2.16.5 allows attackers to obtain sensitive information (an RSA private key) by...
Arm Mbed TLS before 2.16.5 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.
- Record
JLSEC-2025-200- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-10941
Arm Mbed TLS before 2.16.5 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.
- Record
UBUNTU-CVE-2020-10941- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
mbedtlsDebian:12 |
before 2.16.5-1 | 2.16.5-1 |
mbedtlsDebian:13 |
before 2.16.5-1 | 2.16.5-1 |
mbedtlsDebian:14 |
before 2.16.5-1 | 2.16.5-1 |
mbedtlsDebian:10 From an advisory covering 18 CVEs |
before 2.16.9-0~deb10u1, plus listed versions 2.16.0-12.16.2-12.16.3-12.16.4-12.16.5-1 |
2.16.9-0~deb10u1 |
MbedTLS_jllJulia |
before 2.16.6+0 | 2.16.6+0 |
mbedtlsUbuntu:16.04:LTS |
All versions, plus listed versions 2.1.2-12.2.0-12.2.1-12.2.1-22.2.1-2ubuntu0.12.2.1-2ubuntu0.22.2.1-2ubuntu0.3 |
None known |
mbedtlsUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 2.5.1-1ubuntu12.6.0-12.7.0-22.8.0-12.8.0-1ubuntu0.1~esm1 |
None known |
mbedtlsUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 2.16.2-12.16.3-12.16.4-1ubuntu22.16.4-1ubuntu2+esm1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| 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-2020-10941 is a medium vulnerability (CVSS 5.9) in Arm Mbed Tls, published March 24, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.69%, the 77th percentile. Fixed in mbedtls 2.16.5-1.
References
tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-02
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5JPE2HFBDJF3UBT6Q4VWLKNKCVCMX25J
lists.debian.org/debian-lts-announce/2022/12/msg00036.html
nvd.nist.gov/vuln/detail/CVE-2020-10941