Exploited vulnerability · CISA KEV

Is CVE-2018-4878 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · Adobe Flash Player · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2018-4878, Adobe Flash Player Use-After-Free Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 1366 days after it was published. It is known to be used in ransomware campaigns. It affects Adobe Flash Player. If you run it, CISA's required action is: The impacted product is end-of-life and should be disconnected if still in use.

exploitedYesCISA KEV · 3 Nov 2021

ransomwareKnownused in campaigns

EPSStop 1%among the most likely CVEs to be exploited

severity7.8CVSS 3.1 · high

US federal due3 May 2022BOD 22-01 deadline

What it is

Adobe Flash Player contains a use-after-free vulnerability that could allow for code execution.

Vendor	Adobe (83 exploited CVEs in KEV)
Product	Flash Player
Vulnerability	Adobe Flash Player Use-After-Free Vulnerability
Weakness	CWE-416
Published	6 Feb 2018
Added to KEV	3 Nov 2021
Reported by (CNA)	adobe

What to do

Check whether you run it. Look for Flash Player in your asset inventory, including appliances and cloud images. Stack check lists every exploited Adobe CVE at once.
Apply the fix. The impacted product is end-of-life and should be disconnected if still in use.
If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 6 Feb 2018.
Get told next time. Email alerts when CISA adds a CVE for Adobe.

Other exploited CVEs in Flash Player

CVE-2014-0502: Adobe Flash Player Double Free Vulnerablity (17 Sep 2024)
CVE-2013-0648: Adobe Flash Player Code Execution Vulnerability (17 Sep 2024)
CVE-2013-0643: Adobe Flash Player Incorrect Default Permissions Vulnerability (17 Sep 2024)
CVE-2014-0497: Adobe Flash Player Integer Underflow Vulnerablity (17 Sep 2024)
CVE-2012-5054: Adobe Flash Player Integer Overflow Vulnerability (8 Jun 2022)
CVE-2012-0767: Adobe Flash Player Cross-Site Scripting (XSS) Vulnerability (8 Jun 2022)

References

nvd.nist.gov/vuln/detail/CVE-2018-4878

Questions

Is CVE-2018-4878 being exploited?

Yes. CISA added CVE-2018-4878 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2018-4878 used in ransomware attacks?

Yes, CISA lists it as known to be used in ransomware campaigns.

How do I fix CVE-2018-4878?

The impacted product is end-of-life and should be disconnected if still in use. Check Adobe's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Flash Player and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2021 · Adobe scorecard · act-now radar.

Running Adobe in a regulated environment?

We check exposure across your estate, patch or mitigate with your team, and set up detection for what attackers do after exploiting it.

Get in touch →