How severe is CVE-2021-37778?

CVE-2021-37778 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-2021-37778 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37778?

CVE-2021-37778 affects Gps-sdr-sim Project Gps-sdr-sim. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37778?

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-2021-37778 published?

CVE-2021-37778 was published on 2022-06-30 and last updated on 2026-06-17.

CVE-2021-37778

CVE-2021-37778 is a critical-severity vulnerability in Gps-sdr-sim Project Gps-sdr-sim 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Gps-sdr-sim Project Gps-sdr-sim
Published: 2022-06-30
Last modified: 2026-06-17

Description

There is a buffer overflow in gps-sdr-sim v1.0 when parsing long command line parameters, which can lead to DoS or code execution.

Frequently asked questions

What is CVE-2021-37778?: There is a buffer overflow in gps-sdr-sim v1.0 when parsing long command line parameters, which can lead to DoS or code execution.
How severe is CVE-2021-37778?: CVE-2021-37778 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-2021-37778 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37778?: CVE-2021-37778 affects Gps-sdr-sim Project Gps-sdr-sim. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37778?: 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-2021-37778 published?: CVE-2021-37778 was published on 2022-06-30 and last updated on 2026-06-17.

References

https://github.com/osqzss/gps-sdr-sim/issues/294

Affected products (1)

cpe:2.3:a:gps-sdr-sim_project:gps-sdr-sim:1.0:*:*:*:*:*:*:*

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