CVE-2021-45711

CVE-2021-45711 is a high-severity vulnerability in Simple Asn1 Project Simple Asn1 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-20.

Key facts

Description

An issue was discovered in the simple_asn1 crate 0.6.0 before 0.6.1 for Rust. There is a panic if UTCTime data, supplied by a remote attacker, has a second character greater than 0x7f.

Frequently asked questions

What is CVE-2021-45711?
An issue was discovered in the simple_asn1 crate 0.6.0 before 0.6.1 for Rust. There is a panic if UTCTime data, supplied by a remote attacker, has a second character greater than 0x7f.
How severe is CVE-2021-45711?
CVE-2021-45711 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-2021-45711 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-2021-45711?
CVE-2021-45711 affects Simple Asn1 Project Simple Asn1. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45711?
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-2021-45711 published?
CVE-2021-45711 was published on 2021-12-27 and last updated on 2026-06-17.

References

Affected products (1)

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