How severe is CVE-2021-45702?

CVE-2021-45702 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-45702 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45702?

CVE-2021-45702 affects Linuxfoundation Tremor-script. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45702?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-45702 published?

CVE-2021-45702 was published on 2021-12-27 and last updated on 2026-06-17.

CVE-2021-45702

CVE-2021-45702 is a high-severity vulnerability in Linuxfoundation Tremor-script with a CVSS 3.x base score of 7.5. 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-416.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-416
Affected product: Linuxfoundation Tremor-script
Published: 2021-12-27
Last modified: 2026-06-17

Description

An issue was discovered in the tremor-script crate before 0.11.6 for Rust. A merge operation may result in a use-after-free.

Frequently asked questions

What is CVE-2021-45702?: An issue was discovered in the tremor-script crate before 0.11.6 for Rust. A merge operation may result in a use-after-free.
How severe is CVE-2021-45702?: CVE-2021-45702 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-45702 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45702?: CVE-2021-45702 affects Linuxfoundation Tremor-script. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45702?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-45702 published?: CVE-2021-45702 was published on 2021-12-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:linuxfoundation:tremor-script:*:*:*:*:*:rust:*:*

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