CVE-2025-28236Public exploitNetwork attack vector

Unauthenticated root code execution via unsigned firmware package

Published Apr 18, 2025 · Updated Apr 22, 2025

Remote code execution in Nautel VX Series transmitters VX SW 6.4.0 and earlier allows remote attackers to execute arbitrary code. The upgrade handler accepts a crafted .tgz package without validating its digital signature, then runs the package's modified init.sh script as root. Network reachability to the AUI upgrade endpoint is sufficient; successful exploitation grants full transmitter control and can alter or interrupt broadcasts.

CVSS severity9.8
Critical
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Remote code execution in Nautel VX Series transmitters VX SW 6.4.0 and earlier allows remote attackers to execute arbitrary code. The upgrade handler accepts a crafted .tgz package without validating its digital signature, then runs the package's modified init.sh script as root. Network reachability to the AUI upgrade endpoint is sufficient; successful exploitation grants full transmitter control and can alter or interrupt broadcasts.

The record

CVE
CVE-2025-28236
Published
Apr 18, 2025
Updated
Apr 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-494, T0866
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-494Download of Code Without Integrity Check
T0866Exploitation of Remote Services

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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