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Vulnerabilities

Vulnerability · CVE-2020-0099

In addWindow of WindowManagerService.java, there is a possible window overlay attack due to an insecure default value.

Published Dec 1, 2020 · catalog updated Oct 16, 2026 · In addWindow of WindowManagerService.java,

Check if you run it

No confirmed exploitation is on record for CVE-2020-0099. EPSS is 0.55%. Act only if a listed version of In addWindow of WindowManagerService.java, is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (In addWindow of WindowManagerService.java,).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.55%
Remediation
Advisory link
Affected products
Android platform/frameworks/base

In addWindow of WindowManagerService.java, there is a possible window overlay attack due to an insecure default value. This could lead to local escalation of privilege via tapjacking with no additional execution privileges needed. User interaction is needed for exploitation.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Android platform/frameworks/base10:0 → 10:2020-12-01
  • Android platform/frameworks/base8.0:0 → 8.0:2020-12-01
  • Android platform/frameworks/base8.1:0 → 8.1:2020-12-01
  • Android platform/frameworks/base9:0 → 9:2020-12-01

How to fix CVE-2020-0099

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2020-0099. EPSS is 0.55%. Act only if a listed version of In addWindow of WindowManagerService.java, is installed.

Which versions are affected?

Compare what you have installed with 10:0 → 10:2020-12-01, 8.0:0 → 8.0:2020-12-01, 8.1:0 → 8.1:2020-12-01, 9:0 → 9:2020-12-01. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.55%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 1, 2020 · OpenSSF OSV / OSV Scanner

    Detected

    In addWindow of WindowManagerService.java, there is a possible window overlay attack due to an insecure default value. This could lead to local escalation of privilege via tapjacking with no additional execution privileges needed. User interaction is needed for exploitation.

  2. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    platform/frameworks/base fixed in 8.0:2020-12-01; platform/frameworks/base fixed in 8.1:2020-12-01; platform/frameworks/base fixed in 9:2020-12-01; platform/frameworks/base fixed in 10:2020-12-01

  3. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    platform/frameworks/base fixed in 8.0:2020-12-01

  4. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    platform/frameworks/base fixed in 8.1:2020-12-01

  5. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    platform/frameworks/base fixed in 9:2020-12-01

  6. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    platform/frameworks/base fixed in 10:2020-12-01

  7. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    In addWindow of WindowManagerService.java, there is a possible window overlay attack due to an insecure default value. This could lead to local escalation of privilege via tapjacking with no additional execution privileges needed. User interaction is needed for exploitation.

Sources

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.