Multi-Router Looking Glass (MRLG) Buffer Overflow Vulnerability (CVE-2014-3931)
Severity: critical · Patch status: unknown · Since 2025-07-07 · CVE-2014-3931
Multi-Router Looking Glass (MRLG) contains a buffer overflow vulnerability that could allow remote attackers to cause an arbitrary memory write and memory corruption. CISA added CVE-2014-3931 to its Known Exploited Vulnerabilities catalog on Jul 7, 2025, which means attackers are exploiting it in the wild.
What 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.
- US federal agencies must remediate by Jul 28, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
