Is there a public exploit for CVE-2026-121803?

No public exploit for CVE-2026-121803 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-121803?

CVE-2026-121803 scores CVSS 8.8 (v3.1), rated high.

What does CVE-2026-121803 affect?

CVE-2026-121803 affects Unisoc (Shanghai) Technologies Co., Ltd. Storage.

8.8 High

In UFS Field Firmware Update (FFU) functionality, there is a possible out-of-bounds write due to missing bounds checking on the PRDT table…

CVE-2026-121803

In UFS Field Firmware Update (FFU) functionality, there is a possible out-of-bounds write due to missing bounds checking on the PRDT table size. This could lead to local code execution or denial of service with no additional execution privileges needed.

Assessment

CVSS: 8.8 (v3.1)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 4 November 2026
Last updated: 4 November 2026
Affected: Unisoc (Shanghai) Technologies Co., Ltd. · Storage
Assigner: Unisoc

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

At the source

EUVD (ENISA)

References

https://www.unisoc.com/en/support/product-security-bulletin/2117818023857520641

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