CVE-2025-7921

CRITICALNVD 9.89.8—

9.8

Certain modem models developed by Askey has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and potentially execute arbitrary code.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 80.6%
KEV: Not listed

Published

July 21, 2025

Last Modified

April 15, 2026

Advisory Details (2)

Auto-updated May 3, 2026

No patch confirmed yet. Sources: cert.

cert

TWCERT/CC台灣電腦網路危機處理暨協調中心|企業資安通報協處|資安情資分享|漏洞通報|資安聯盟|資安電子報-亞旭｜數據機 - Stack-based Buffer Overflow

https://www.twcert.org.tw/tw/cp-132-10268-1583b-1.html

cert

TWCERT/CC Taiwan Computer Emergency Response Team/Coordination Center-ASKEY｜modem - Stack-based Buffer Overflow

https://www.twcert.org.tw/en/cp-139-10269-c9839-2.html

Weakness Classification(1)

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

CWE-121Stack-based Buffer Overflow

Data Freshness Timeline

(refreshed 13× in last 7d / 20× 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.

2026-06-06 13:47 UTCepss_batch
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Frequently asked(5)

What is CVE-2025-7921?

CVE-2025-7921 is a critical vulnerability published on July 21, 2025. Certain modem models developed by Askey has a Stack-based Buffer Overflow vulnerability, allowing unauthenticated remote attackers to control the program's execution flow and potentially execute arbitrary code.

When was CVE-2025-7921 disclosed?

CVE-2025-7921 was first published in the National Vulnerability Database on July 21, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-7921 actively exploited?

CVE-2025-7921 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-7921?

CVE-2025-7921 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2025-7921?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-7921, 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-2025-7921

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CVE-2025-7921

📅 Published

🔄 Last Modified

📋 Advisory Details (2)