What is CVE-2021-37778?

CVE-2021-37778 is a critical-severity vulnerability in Gps-Sdr-Sim Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-06-30.

How severe is CVE-2021-37778?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-37778 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Gps-Sdr-Sim Project

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.

Vulnerability class: Buffer Overflow

Published 2022-06-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: +0.000

Affected products

Gps-Sdr-Sim Project — versions 1.0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

References

github.com/osqzss/gps-sdr-sim/issues/294 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-37778?: CVE-2021-37778 is a critical-severity vulnerability in Gps-Sdr-Sim Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-06-30.
How severe is CVE-2021-37778?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-37778 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.