CVE-2021-33027
Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
- Record
CVE-2021-33027- 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 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-331
- Updated
- 2026-11-02
CVE List No score
Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
- Record
CVE-2021-33027- Updated
- 2026-11-02
EUVDEUVD-2021-19747 No score
Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
- Record
EUVD-2021-19747- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8jh5-pc7c-26pc No score
Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
- Record
GHSA-8jh5-pc7c-26pc- Weakness
- CWE-331
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-33027
Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
- Record
UBUNTU-CVE-2021-33027- 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
Affected packages
| Package | Affected | Fixed |
|---|---|---|
singularityUbuntu:16.04:LTS |
All versions, plus listed versions 0.30c-1 |
None known |
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-2021-33027 is a critical vulnerability (CVSS 9.8) in Sylabs Singularity, published July 19, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.29%, the 70th percentile. No source names a fixed version.