CVE-2016-4121

critical

Published 2016-06-16 · Modified 2026-05-06

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CVSS v3

9.8

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

9.8

Description

Use-after-free vulnerability in Adobe Flash Player before 18.0.0.352 and 19.x through 21.x before 21.0.0.242 on Windows and OS X and before 11.2.202.621 on Linux allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2016-1097, CVE-2016-1106, CVE-2016-1107, CVE-2016-1108, CVE-2016-1109, CVE-2016-1110, CVE-2016-4108, and CVE-2016-4110.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

Linux kernel Fixed 1 release

Version	Status	Fixed in
-	Not affected	—

macOS Fixed 1 release

Version	Status	Fixed in
-	Not affected	—

Windows Fixed 1 release

Version	Status	Fixed in
-	Not affected	—

Application impact

Vendor	Product	Versions
adobe	flash_player	`{"endIncluding":"21.0.0.241"}`
adobe	air_sdk_\&_compiler	`{"endIncluding":"21.0.0.198"}`
adobe	air_sdk	`{"endIncluding":"21.0.0.198"}`
adobe	flash_player_desktop_runtime	`{"endIncluding":"21.0.0.226"}`
adobe	air_desktop_runtime	`{"endIncluding":"21.0.0.198"}`

References

CWEs

CWE-416

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.