# CVE-2025-31718 — Unisoc (Shanghai) Technologies Co., Ltd. T606/T612/T616/T750/T765/T760/T770/T820/S8000/T8300/T9300

> As of 2025-10-15, CVE-2025-31718 is a HIGH-severity vulnerability in Unisoc (Shanghai) Technologies Co., Ltd. T606/T612/T616/T750/T765/T760/T770/T820/S8000/T8300/T9300, CVSS v3.1 7.5, EPSS 0.9% (58.8th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2025-31718, most recently “Unisoc T612/T606/T7250 Modem Exploit Chain: Malicious VoLTE Video Call Enables Full Android Kernel Access (CVE-2025-31718 + Unpatched MPU Privilege Escalation)”.

**Last updated:** 2025-10-15

## What is CVE-2025-31718?

In modem, there is a possible system crash due to improper input validation. This could lead to remote escalation of privilege with no additional execution privileges needed.

Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 345 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **EPSS (FIRST):** 0.9% probability of exploitation in the next 30 days, higher than 58.8% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2025-10-11, last modified 2025-10-15

## Is CVE-2025-31718 being exploited?

No public exploitation evidence for CVE-2025-31718 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2025-10-15. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- **Unisoc (Shanghai) Technologies Co., Ltd.**: T606/T612/T616/T750/T765/T760/T770/T820/S8000/T8300/T9300

## How to fix CVE-2025-31718

No vendor patch reference has been recorded for CVE-2025-31718 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2025-31718

1 tracked threat in the Threadlinqs corpus references CVE-2025-31718, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Unisoc T612/T606/T7250 Modem Exploit Chain: Malicious VoLTE Video Call Enables Full Android Kernel Access (CVE-2025-31718 + Unpatched MPU Privilege Escalation)](https://intel.threadlinqs.com/threat/TL-2026-2223) — HIGH · 2026-08-29

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-08-31. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [unisoc.com](https://www.unisoc.com/en/support/announcement/1976557615080263681)

Canonical: https://intel.threadlinqs.com/cve/CVE-2025-31718
Full detection coverage and IOCs for threats exploiting CVE-2025-31718 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp