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Known exploited vulnerability

CVE-2014-3931

criticalCVSS 3.1 9.8In CISA KEVEPSS 29%Published · n/a

The short answer

CVE-2014-3931 affects n/a n/a and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-07-07: attackers are using it, so patch it first.

What it is

fastping.c in MRLG (aka Multi-Router Looking Glass) before 5.5.0 allows remote attackers to cause an arbitrary memory write and memory corruption.

Weakness: CWE-119.

Severity

9.8 critical

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

Exploited (CISA KEV)

Yes, since Jul 7, 2025

Federal due date Jul 28, 2025

EPSS, next 30 days

29%

Higher than 98% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Affected products

n/a. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2014-3931 being exploited?

Yes. CISA added CVE-2014-3931 to its Known Exploited Vulnerabilities catalog on 2025-07-07, with a federal remediation due date of 2025-07-28.

How do I fix CVE-2014-3931?

CISA's required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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