Improper Input Validation in Android AnnotationProcessor

Publication date: 2026-09-08

Last updated on: 2026-09-25

Assigner: Android (associated with Google Inc. or Open Handset Alliance)

Description

In AppendCommentLine of AnnotationProcessor.cpp, there is a possible supply chain risk due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-08

Last Modified

2026-09-25

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-55273

Affected Vendors & Products

Vendor	Product	Version / Range
google	android	16.0
google	android	16.0
google	android	17.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper input validation in the AnnotationProcessor.cpp file, specifically in the AppendCommentLine function. It creates a potential supply chain risk that could allow local privilege escalation without needing additional execution privileges or user interaction.

Impact Analysis

An attacker could exploit this to gain elevated privileges on your system, potentially allowing them to perform unauthorized actions or access sensitive data. Since no user interaction is required, the risk is higher as exploitation could occur silently in the background.

Mitigation Strategies

Apply the latest security patches or updates from the vendor to address the improper input validation in AnnotationProcessor.cpp. Monitor official Android security bulletins for patches related to this CVE.

Hi! I’m here to help you understand CVE-2026-55273. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70