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ExploitedIn CISA KEVFix available

CVE-2016-7855

Exploitation confirmed. First attested on 2022-03-03 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2016-11-01
  • WeaknessCWE-416

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

Use-after-free vulnerability in Adobe Flash Player before 23.0.0.205 on Windows and OS X and before 11.2.202.643 on Linux allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in October 2016.

Timeline

dates in UTC
  1. 2016-11-0122:59CVE publishedNVD
  2. 2022-03-03Listed as exploited by GCVEGCVE
  3. 2022-03-03Exploitation first reportedCISA KEV
  4. 2022-03-03Added to the CISA KEV catalogCISA KEV
  5. 2025-02-0421:34SSVC exploitation set to activeCISA-ADP
  6. 2026-10-2319:23First public proof of conceptPoC-in-GitHub
  7. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

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-2016-7855?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-7855?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
BranchAffectedFixed in
23.0≤ 23.0.0.185no fix published
11.2≤ 11.2.202.637no fix published
Redhat enterprise linux desktop
BranchAffectedFixed in
5.0= 5.0no fix published
6.0= 6.0no fix published
Redhat enterprise linux server
BranchAffectedFixed in
5.0= 5.0no fix published
6.0= 6.0no fix published

1 more product in the sources.

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

Fix

  1. CISA’s required action: The impacted product is end-of-life and should be disconnected if still in use.due 2022-03-24

Advisories and patches

Detection

read 2026-10-23 19:23 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedswagatbora90/CheckFlashPlayerVersion
PoC-in-GitHub

CISA Known Exploited Vulnerability

Date Added
2022-03-03
Patch Due Date
2022-03-24
Ransomware Use
Unknown
Required Action
The impacted product is end-of-life and should be disconnected if still in use.

Sources

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
2016-11-01
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is CVE-2016-7855?

Use-after-free vulnerability in Adobe Flash Player before 23.0.0.205 on Windows and OS X and before 11.2.202.643 on Linux allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in October 2016.

Is CVE-2016-7855 actively exploited?

Yes. CVE-2016-7855 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-03-24.

What is the CVSS score for CVE-2016-7855?

CVE-2016-7855 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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Same product first, then the same vendor advisory and the same publication week.

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