CVE-2018-4878

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2021-11-03. Federal remediation due 2022-05-03. Known ransomware campaign use: reported by CISA.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

90.28% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.7% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Critical. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2018-02-06 20:00Z8 YR AGO

Last updated

2025-11-17 19:33Z11 MO AGO

Reserved

2018-01-03

Assigning CNA

adobe

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.2

Document digest

06f34023270022ba20ca25a61b84b546fd17d7b926a745aced31c3bba310529e

• blog.talosintelligence.comhttp://blog.talosintelligence.com/2018/02/group-123-goes-wild.htmlx_refsource_MISC
• threatpost.comhttps://threatpost.com/adobe-flash-player-zero-day-spotted-in-the-wild/129742/x_refsource_MISC
• helpx.adobe.comhttps://helpx.adobe.com/security/products/flash-player/apsb18-03.htmlx_refsource_MISC
• access.redhat.comRHSA-2018:0285https://access.redhat.com/errata/RHSA-2018:0285vendor-advisoryx_refsource_REDHAT
• www.securitytracker.com1040318http://www.securitytracker.com/id/1040318vdb-entryx_refsource_SECTRACK
• www.securityfocus.com102893http://www.securityfocus.com/bid/102893vdb-entryx_refsource_BID
• www.fireeye.comhttps://www.fireeye.com/blog/threat-research/2018/02/attacks-leveraging-adobe-zero-day.htmlx_refsource_MISC
• blog.morphisec.comhttps://blog.morphisec.com/flash-exploit-cve-2018-4878-spotted-in-the-wild-massive-malspam-campaignx_refsource_MISC
• www.darkreading.comhttps://www.darkreading.com/threat-intelligence/adobe-flash-vulnerability-reappears-in-malicious-word-files/d/d-id/1331139x_refsource_MISC
• github.comhttps://github.com/InQuest/malware-samples/tree/master/CVE-2018-4878-Adobe-Flash-DRM-UAF-0dayx_refsource_MISC
• www.trendmicro.comhttps://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-targetsx_refsource_MISC
• github.comhttps://github.com/vysec/CVE-2018-4878x_refsource_MISC
• securingtomorrow.mcafee.comhttps://securingtomorrow.mcafee.com/mcafee-labs/hackers-bypassed-adobe-flash-protection-mechanism/x_refsource_MISC
• www.exploit-db.com44412https://www.exploit-db.com/exploits/44412/exploitx_refsource_EXPLOIT-DB
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4878government-resource
• github.comhttps://github.com/cisagov/vulnrichment/issues/196issue-tracking