← gociux.comall exploited CVEs

Exploited vulnerability · CISA KEV

Is CVE-2010-3765 exploited? Yes: in CISA KEV since 6 Oct 2025

Gociux · Mozilla Multiple Products · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2010-3765, Mozilla Multiple Products Remote Code Execution Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 6 Oct 2025, 5458 days after it was published. It affects Mozilla Multiple Products. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 6 Oct 2025
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due27 Oct 2025BOD 22-01 deadline

What it is

Mozilla Firefox, SeaMonkey, and Thunderbird contain an unspecified vulnerability when JavaScript is enabled. This allows remote attackers to execute arbitrary code via vectors related to nsCSSFrameConstructor::ContentAppended, the appendChild method, incorrect index tracking, and the creation of multiple frames, which triggers memory corruption.

VendorMozilla (13 exploited CVEs in KEV)
ProductMultiple Products
VulnerabilityMozilla Multiple Products Remote Code Execution Vulnerability
Weaknessnot specified
Published27 Oct 2010
Added to KEV6 Oct 2025
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for Multiple Products in your asset inventory, including appliances and cloud images. Stack check lists every exploited Mozilla CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. 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 27 Oct 2010.
  4. Get told next time. Email alerts when CISA adds a CVE for Mozilla.

References

Questions

Is CVE-2010-3765 being exploited?

Yes. CISA added CVE-2010-3765 to the Known Exploited Vulnerabilities catalog on 6 Oct 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2010-3765 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2010-3765?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check Mozilla's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Multiple Products 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 October 2025 · Mozilla scorecard · act-now radar.

Running Mozilla 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 →