CVE-2021-33027
CVE-2021-33027 is a critical-severity vulnerability in Sylabs Singularity with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-331.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 1% (68th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-331
- Affected product: Sylabs Singularity
- Published:
- Last modified:
Description
Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
Frequently asked questions
- What is CVE-2021-33027?
- Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
- How severe is CVE-2021-33027?
- CVE-2021-33027 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-33027 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-33027?
- CVE-2021-33027 affects Sylabs Singularity. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-33027?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-33027 published?
- CVE-2021-33027 was published on 2021-07-19 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:sylabs:singularity:*:*:*:*:enterprise:*:*:*
More vulnerabilities in Sylabs Singularity
- CVE-2021-33622 — Critical (CVSS 9.8): Sylabs Singularity 3.5.x and 3.6.x, and SingularityPRO before 3.5-8, has an Incorrect Check of a Function's Return…
- CVE-2020-25040 — High (CVSS 8.8): Sylabs Singularity through 3.6.2 has Insecure Permissions on temporary directories used in explicit and implicit…
- CVE-2019-11328 — High (CVSS 8.8): An issue was discovered in Singularity 3.1.0 to 3.2.0-rc2, a malicious user with local/network access to the host…
- CVE-2020-15229 — High (CVSS 8.2): Singularity (an open source container platform) from version 3.1.1 through 3.6.3 has a vulnerability. Due to insecure…
- CVE-2020-25039 — High (CVSS 8.1): Sylabs Singularity 3.2.0 through 3.6.2 has Insecure Permissions on temporary directories used in fakeroot or user…
- CVE-2018-19295 — High (CVSS 7.8): Sylabs Singularity 2.4 to 2.6 allows local users to conduct Improper Input Validation attacks.
All CVEs affecting Sylabs Singularity →
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