Signal
CISA warns of data-theft vulnerability in NSA's GrassMarlin OT networking tool
Evidence first: scan the strongest sources, then decide whether to go deeper.
Published 2026-04-28 23:58 UTCUpdated 2026-04-29 15:35 UTC
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cvevulnerabilityindustrial_control_systemssecurity_advisory
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Evidence trail (top sources)
top sources (2 domains)domains are deduped. counts indicate coverage, not truth.2 top sources shown
limited source diversity in top sources
Overview
CISA has alerted users of the NSA-developed GrassMarlin OT networking tool to a moderate severity vulnerability (CVE-2026-6807) that could lead to sensitive information disclosure. The flaw requires local access and limited privileges but no user interaction, raising concerns for critical infrastructure security. Prompt patching is recommended to mitigate risks of espionage or sabotage in industrial control systems using GrassMarlin.
Entities
NSA GrassMarlin
Score total
0.84
Momentum 24h
2
Posts
2
Origins
2
Source types
1
Duplicate ratio
0%
Why now
- CISA's recent advisory highlights the vulnerability's active risk to users of GrassMarlin.
- The vulnerability has a CVSS score of 5.5, indicating moderate severity requiring attention.
- NSA-developed tools in critical infrastructure require continuous security scrutiny.
Why it matters
- GrassMarlin is used in critical industrial control systems, so vulnerabilities can impact infrastructure security.
- The flaw allows sensitive data exposure, increasing risk of espionage or sabotage.
- Timely patching is essential to prevent exploitation by attackers with local access.
LLM analysis
Topic mix: lowPromo risk: lowSource quality: medium
Recurring claims
- CVE-2026-6807 in NSA GrassMarlin allows local attackers with limited privileges to disclose sensitive information without user interaction.
How sources frame it
- Theregister_security: neutral
Consolidated advisory details for clarity; no new facts added.
All evidence
All evidence
CISA flags data-theft bug in NSA-built OT networking tool
theregister_security · go.theregister.com · 2026-04-29 15:35 UTC
NSA GRASSMARLIN: CVSS (Max): 5.5
AusCERT - Bulletins · portal.auscert.org.au · 2026-04-28 23:58 UTC
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Posts loaded: 0Publishers: 2Origin domains: 2Duplicates: -
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Top publishers (this list)
- theregister_security (1)
- AusCERT - Bulletins (1)
Top origin domains (this list)
- go.theregister.com (1)
- portal.auscert.org.au (1)