Is CVE-2026-3893 actively exploited?

No active exploitation of CVE-2026-3893 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3893 be exploited remotely?

Yes. CVE-2026-3893 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3893?

CVE-2026-3893 has a CVSS score of 9.4 (CRITICAL).

HOME VULNERABILITIESCVE-2026-3893

CRITICAL

CVE-2026-3893

CWE-306Published: April 28, 2026· Updated: Apr 28, 2026

9.4

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:19.3th

Official Description

The Carlson VASCO-B GNSS Receiver lacks an authentication mechanism,

allowing an attacker with network access to directly access and modify

its configuration and operational functions without needing credentials.

NVD Source

Technical Analysis

CVE-2026-3893 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 full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.4.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

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Security advisories & exploits

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News & Research Mentioning CVE-2026-3893

Carlson Software VASCO-B GNSS Receiver

CISA Alerts· Apr 23, 2026

View CSAF Summary Successful exploitation of this vulnerability could enable a remote attacker to alter critical system functions or disrupt device operation. The following versions of Carlson Software VASCO-B GNSS Receiver are affected: VASCO-B GNSS Receiver <1.4.0 (CVE-2026-3893) CVSS Vendor Equipment Vulnerabilities v3 9.4 Carlson Software Carlson Software VASCO-B GNSS Receiver Missing Authentication for Critical Function Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-3893 The Carlson VASCO-B GNSS Receiver lacks an authentication mechanism, allowing an attacker with network access to directly access and modify [xlite_meta score:73 src:CISA Alerts xlite_fp:ee42119f12b982c40417a62adbee90f0985e34d52f614e3ec9a5fb4e25a35312]