CVE-2021-31698

CRITICALNVD 9.89.8—

9.8

Quectel EG25-G devices through 202006130814 allow executing arbitrary code remotely by using an AT command to place shell metacharacters in quectel_handle_fumo_cfg input in atfwd_daemon.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 62.3%
KEV: Not listed

Published

August 12, 2021

Last Modified

November 21, 2024

References (2)

cve@mitrehttps://nns.ee/blog/2021/04/03/modem-rce.html
af854a3a-2127-422b-91ae-364da2661108https://nns.ee/blog/2021/04/03/modem-rce.html

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 7× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 12:06 UTCEG score recompute
2026-05-26 12:06 UTCGHSA enrichment
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-31698?

CVE-2021-31698 is a critical vulnerability published on August 12, 2021. Quectel EG25-G devices through 202006130814 allow executing arbitrary code remotely by using an AT command to place shell metacharacters in quectelhandlefumocfg input in atfwddaemon.

When was CVE-2021-31698 disclosed?

CVE-2021-31698 was first published in the National Vulnerability Database on August 12, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-31698 actively exploited?

CVE-2021-31698 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 62.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-31698?

CVE-2021-31698 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-31698?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-31698, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-31698

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CVE-2021-31698

📅 Published

🔄 Last Modified

🔗 References (2)