Exploitation evidence
Known exploited · CISA KEV listed
Added 2021-11-03. Ransomware campaign use: Known.
CISA required action: The impacted product is end-of-life and should be disconnected if still in use.
CISA due date: 2022-05-03. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
n/a / Adobe Flash Player before 28.0.0.161
Default status: Not specified
- affected: Adobe Flash Player before 28.0.0.161
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- http://blog.talosintelligence.com/2018/02/group-123-goes-wild.html
- https://threatpost.com/adobe-flash-player-zero-day-spotted-in-the-wild/129742/
- https://helpx.adobe.com/security/products/flash-player/apsb18-03.html
- https://access.redhat.com/errata/RHSA-2018:0285
- http://www.securitytracker.com/id/1040318
- http://www.securityfocus.com/bid/102893
- https://www.fireeye.com/blog/threat-research/2018/02/attacks-leveraging-adobe-zero-day.html
- https://blog.morphisec.com/flash-exploit-cve-2018-4878-spotted-in-the-wild-massive-malspam-campaign
- https://www.darkreading.com/threat-intelligence/adobe-flash-vulnerability-reappears-in-malicious-word-files/d/d-id/1331139
- https://github.com/InQuest/malware-samples/tree/master/CVE-2018-4878-Adobe-Flash-DRM-UAF-0day
- https://www.trendmicro.com/vinfo/us/security/news/vulnerabilities-and-exploits/north-korean-hackers-allegedly-exploit-adobe-flash-player-vulnerability-cve-2018-4878-against-south-korean-targets
- https://github.com/vysec/CVE-2018-4878
- https://securingtomorrow.mcafee.com/mcafee-labs/hackers-bypassed-adobe-flash-protection-mechanism/
- https://www.exploit-db.com/exploits/44412/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4878
- https://github.com/cisagov/vulnrichment/issues/196
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.9028,
"percentile": 0.99801
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.9028,
"percentile": 0.998
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.9028,
"percentile": 0.998
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.9028,
"percentile": 0.99799
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.9028,
"percentile": 0.998
}07 Nov 2026, 00:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
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},
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},
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},
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},
{
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},
"cveMetadata": {
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"assignerShortName": "adobe",
"cveId": "CVE-2018-4878",
"datePublished": "2018-02-06T20:00:00.000Z",
"dateReserved": "2018-01-03T00:00:00.000Z",
"dateUpdated": "2025-11-17T19:33:19.689Z",
"state": "PUBLISHED"
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}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.9028,
"percentile": 0.99799
}05 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.9028,
"percentile": 0.99799
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.9028,
"percentile": 0.99799
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.9028,
"percentile": 0.99798
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.9028,
"percentile": 0.99798
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2018-4878",
"cwes": [
"CWE-416"
],
"dateAdded": "2021-11-03",
"dueDate": "2022-05-03",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Known",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2018-4878",
"product": "Flash Player",
"requiredAction": "The impacted product is end-of-life and should be disconnected if still in use.",
"shortDescription": "Adobe Flash Player contains a use-after-free vulnerability that could allow for code execution.",
"vendorProject": "Adobe",
"vulnerabilityName": "Adobe Flash Player Use-After-Free Vulnerability"
}