Is CVE-2026-49842 actively exploited?

No active exploitation of CVE-2026-49842 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-49842 be exploited remotely?

Yes. CVE-2026-49842 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-49842?

CVE-2026-49842 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-49842

CWE-400Published: June 9, 2026· Updated: Jun 10, 2026

7.5

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:17.1th

Official Description

FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, mod_verto's WebSocket frame loop intercepts a #-prefixed speed-test protocol (#SPU / #SPB / #SPE) before any authentication check. The declared payload size in #SPU was parsed with atoi() and only rejected non-positive values, so an unauthenticated peer could request up to INT_MAX bytes. The server then wrote roughly size * 10 bytes back during the download phase, on the order of 20 GB per request, yielding strong outbound bandwidth amplification from a short request. This issue has been patched in version 1.11.1.

NVD Source

Technical Analysis

CVE-2026-49842 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.