No exploitation reportedFix available

CVE-2016-1021

No exploitation reported by the sources we read.

Published2016-04-09
WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Adobe Flash Player before 18.0.0.343 and 19.x through 21.x before 21.0.0.213 on Windows and OS X and before 11.2.202.616 on Linux allows attackers to execute arbitrary code or cause a denial of service (memory corruption) via unspecified vectors, a different vulnerability than CVE-2016-1012, CVE-2016-1020, CVE-2016-1022, CVE-2016-1023, CVE-2016-1024, CVE-2016-1025, CVE-2016-1026, CVE-2016-1027, CVE-2016-1028, CVE-2016-1029, CVE-2016-1032, and CVE-2016-1033.

Timeline

dates in UTC

2016-04-0901:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-1021?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-1021?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Adobe flash playerversion to verify

Branch	Affected	Fixed in	Source
11.2	≤ 11.2.202.577	no fix published	NVD
18.0	≤ 18.0.0.333	no fix published	NVD
21.0	≤ 21.0.0.197	no fix published	NVD

Adobe air desktop runtimeversion to verify

Branch	Affected	Fixed in	Source
21.0	≤ 21.0.0.176	no fix published	NVD

Adobe air sdkversion to verify

Branch	Affected	Fixed in	Source
21.0	≤ 21.0.0.176	no fix published	NVD

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

helpx.adobe.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.09.3read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score3.8 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2016-04-09
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2016-1021?

Is CVE-2016-1021 actively exploited?

Active exploitation of CVE-2016-1021 has not been confirmed. Its EPSS score was 3.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-1021?

CVE-2016-1021 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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