CVE-2026-66086Stack-based Buffer Overflow in Modem
Updated under an hour ago ()
Does this affect you?
It affects Unisoc (Shanghai) Technologies Co., Ltd. Modem. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.46%, higher than 38% of scored CVEs.
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In the modem OTA stack, there is a possible stack-based buffer overflow due to improper validation of scheduling information in SIB1 messages. This could lead to remote code execution or denial of service with no additional execution privileges needed.
- CVSS
- 8.3 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-121
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.46% (percentile 38)
- Assigned by
- Unisoc
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 12, 2026
Affected products
Unisoc (Shanghai) Technologies Co., Ltd. Modem unisoc_shanghai_technologies:modem (from the name) | T8100; T9100; UDX710 | CNA record |
References
- https://www.unisoc.com/en/support/product-security-bulletin/2109454821805424641
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.