How severe is CVE-2021-45462?

CVE-2021-45462 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-2021-45462 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45462?

CVE-2021-45462 affects Open5gs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45462?

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-2021-45462 published?

CVE-2021-45462 was published on 2021-12-23 and last updated on 2026-06-17.

CVE-2021-45462

CVE-2021-45462 is a high-severity vulnerability in Open5gs 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-1284.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1284
Affected product: Open5gs
Published: 2021-12-23
Last modified: 2026-06-17

Description

In Open5GS 2.4.0, a crafted packet from UE can crash SGW-U/UPF.

Frequently asked questions

What is CVE-2021-45462?: In Open5GS 2.4.0, a crafted packet from UE can crash SGW-U/UPF.
How severe is CVE-2021-45462?: CVE-2021-45462 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-2021-45462 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45462?: CVE-2021-45462 affects Open5gs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45462?: 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-2021-45462 published?: CVE-2021-45462 was published on 2021-12-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:open5gs:open5gs:2.4.0:*:*:*:*:*:*:*

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