CVE-2021-45709

CVE-2021-45709 is a critical-severity vulnerability in Crypto2 Project Crypto2 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-119.

Key facts

Description

An issue was discovered in the crypto2 crate through 2021-10-08 for Rust. During Chacha20 encryption and decryption, an unaligned read of a u32 may occur.

Frequently asked questions

What is CVE-2021-45709?
An issue was discovered in the crypto2 crate through 2021-10-08 for Rust. During Chacha20 encryption and decryption, an unaligned read of a u32 may occur.
How severe is CVE-2021-45709?
CVE-2021-45709 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-2021-45709 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45709?
CVE-2021-45709 affects Crypto2 Project Crypto2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45709?
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-2021-45709 published?
CVE-2021-45709 was published on 2021-12-27 and last updated on 2026-06-17.

References

Affected products (1)

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