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CVE-2026-6807

NSA GRASSMARLIN Improper Restriction of XML External Entity Reference

Published: Apr 28, 2026Updated: Apr 28, 2026 Sources: CVE List NVD
NVD MITRE
5.5CVSS
MEDIUM

A vulnerability in GRASSMARLIN v3.2.1 allows crafted session data to trigger improper handling of XML input, which may result in unintended exposure of sensitive information. The flaw stems from insufficient hardening of the XML parsing process.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None

Weaknesses

CWE-611

Affected Products

GRASSMARLIN
NSA

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

2 techniques
Collection
Initial Access
View detailed technique mapping

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-118-01
cisa.gov
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-118-01.json
github.com

Timeline

Published
Apr 28, 2026
Last Updated
Apr 28, 2026

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