Remote service interruption via incorrect modem bounds check
Published Sep 1, 2025 · Updated Feb 17, 2026
Out-of-bounds read in MediaTek Modem NR15, NR16, NR17, and NR17R allows remote attackers to interrupt device service via a rogue base station. MediaTek has not disclosed the affected modem routine or input field; the published mechanism states that an incorrect bounds check permits a read outside the intended buffer. Exploitation requires connection to an attacker-controlled base station, requires no privileges or user interaction, and affects availability without reported disclosure or modification.
Summary
What happened
Out-of-bounds read in MediaTek Modem NR15, NR16, NR17, and NR17R allows remote attackers to interrupt device service via a rogue base station. MediaTek has not disclosed the affected modem routine or input field; the published mechanism states that an incorrect bounds check permits a read outside the intended buffer. Exploitation requires connection to an attacker-controlled base station, requires no privileges or user interaction, and affects availability without reported disclosure or modification.
The record
- CVE
- CVE-2025-20703
- Published
- Sep 1, 2025
- Updated
- Feb 17, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-125, T1499
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 1, 2025CVE publishedPublication date reported by the CVE source.
- Feb 17, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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