CVE-2025-71252: Unisoc Modem IMS improper input validation denial of service

CVE-2025-71252 · Severity: high · CVSS 7.5 · Published 2026-05-06

A vulnerability exists in the IP Multimedia Subsystem (IMS) component of several Unisoc mobile chipsets. This component is responsible for handling voice and multimedia services over cellular networks. An attacker could exploit this flaw to remotely crash the device's modem, leading to a loss of cellular connectivity and a denial of service for the user.

Technologies: Unisoc Sc7731e, Unisoc Sc9832e, Unisoc Sc9863a, Unisoc T310, Unisoc T610, Unisoc T618, Unisoc T7200, Unisoc T7225, Unisoc T7250, Unisoc T7255, Unisoc T7280, Unisoc T7300, Unisoc T8100, Unisoc T8200, Unisoc T8300, Unisoc T9100. Vendors: Unisoc.

Quick answers

Is CVE-2025-71252 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-71252 being exploited in the wild.
How severe is CVE-2025-71252?
High severity, with a CVSS score of 7.5, published 6 May 2026.
Which products and versions are affected?
Unisoc Sc7731e Android 13, 14, 15, 16; Unisoc Sc9832e Android 13, 14, 15, 16; Unisoc Sc9863a Android 13, 14, 15, 16; Unisoc T310 Android 13, 14, 15, 16; and 12 more.
Is there a fix for CVE-2025-71252?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2025-71252 attacked?
It is attacked over the network, in device firmware.
Am I affected by CVE-2025-71252?
Check whether you run Unisoc Sc7731e, Unisoc Sc9832e, Unisoc Sc9863a or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An improper input validation vulnerability (CWE-20) exists in the Unisoc Modem IMS (IP Multimedia Subsystem) component. The flaw allows a remote, unauthenticated attacker to send specially crafted packets over the network to trigger a system crash or modem reset. No user interaction or special execution privileges are required to exploit this vulnerability. The issue affects a wide range of Unisoc chipsets (including SC and T series) running Android versions 13, 14, 15, and 16. Successful exploitation results in a complete denial of service for cellular and multimedia functions.

Affected products

  • Unisoc SC7731E Android 13, 14, 15, 16
  • Unisoc SC9832E Android 13, 14, 15, 16
  • Unisoc SC9863A Android 13, 14, 15, 16
  • Unisoc T310 Android 13, 14, 15, 16
  • Unisoc T610 Android 13, 14, 15, 16
  • Unisoc T618 Android 13, 14, 15, 16
  • Unisoc T7200 Android 13, 14, 15, 16
  • Unisoc T7225 Android 13, 14, 15, 16
  • Unisoc T7250 Android 13, 14, 15, 16
  • Unisoc T7255 Android 13, 14, 15, 16
  • Unisoc T7280 Android 13, 14, 15, 16
  • Unisoc T7300 Android 13, 14, 15, 16
  • Unisoc T8100 Android 13, 14, 15, 16
  • Unisoc T8200 Android 13, 14, 15, 16
  • Unisoc T8300 Android 13, 14, 15, 16
  • Unisoc T9100 Android 13, 14, 15, 16

Timeline

  • 2026-05-06: advisory: Initial advisory published by Unisoc

References

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