CVE-2026-28627 Google CVE debrief

Who should care

Defenders responsible for Google Android systems, particularly those managing enterprise or high-risk environments, should assess exposure and verify patching to prevent potential downgrade attacks and information disclosure.

Why it matters

CVE-2026-28627 is a medium-severity vulnerability in Google Android that could lead to downgrade attacks and information disclosure. Defenders should assess exposure, verify patching, and monitor for potential attacks.

• Defenders should verify patching to prevent potential downgrade attacks.
• System administrators should assess exposure and update incident response plans.
• Security teams should monitor for potential information disclosure attempts.
• Risk management teams should review and update risk assessments for Google Android systems.

Technical summary

The btm_sec_encrypt_change function in btm_sec.cc contains a logic error that could lead to a downgrade attack, potentially resulting in remote information disclosure. This vulnerability affects Google Android versions 16.0 and 17.0. The vulnerability has a CVSS score of 4.3, indicating a medium-severity issue. Defenders should assess exposure, verify patching, and monitor for potential attacks. The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions.

Defensive priority

Medium priority for defenders to assess exposure and verify patching, given the CVSS score of 4.3 and the potential for information disclosure.

Recommended defensive actions

• Assess exposure by reviewing system configurations and inventory for affected Google Android versions.
• Verify patching by applying available updates from Google.
• Monitor for potential downgrade attacks and information disclosure attempts.
• Review and update incident response plans to address potential consequences of exploitation.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. However, the corpus does not establish specific versions or exploitation details, requiring verification from official sources.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.