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Critical Zero-Day in Global SATCOM Systems Exploited by Multiple State Actors

A critical remote code execution vulnerability in Viasat and Iridium satellite communication firmware has been independently discovered and weaponized by at least three nation-state cyber units, affecting military and civilian SATCOM globally.

27 February 2026Last updated 01 March 20266 min readMultiple Intelligence Sources
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Executive Takeaway — TL;DR

Category:
Zero-Day Exploits
Severity:
Critical
Geography:
Russia
CVE:
CVE-2026-1847
Source:
Multiple Intelligence Sources
Read Time:
6 min

Overview

Multiple intelligence sources confirm that a critical zero-day vulnerability (CVE-2026-1847) in satellite communication firmware has been independently weaponized by at least three nation-state actors.

Vulnerability Details

  • Type: Remote Code Execution via buffer overflow in telemetry parsing
  • CVSS Score: 9.8 (Critical)
  • Affected Systems: Military and civilian SATCOM terminals
  • Exploitation: No user interaction required

Impact Assessment

This vulnerability allows attackers to:

  • Intercept encrypted satellite communications
  • Inject false telemetry data
  • Disable satellite terminals remotely
  • Establish persistent backdoors in satellite ground stations

Mitigation

No patch is currently available. Organizations should implement network-level mitigations and monitor SATCOM terminal behavior for anomalies.

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