CVE-2026-48694Network attack vector

Router configuration takeover via newline command injection

Published May 26, 2026 · Updated May 26, 2026

Configuration injection in FastNetMon Community Edition 1.2.9 and earlier allows attackers to alter connected Juniper routers. The Juniper plugin interpolates argv[1] into line-delimited NETCONF set and delete commands, so embedded newlines create additional Junos commands. Reachability requires control of the plugin's IP argument; the default inet_ntoa() caller emits safe IPv4 text, while a custom wrapper or chained flaw can expose configuration at the NETCONF account's privilege level.

CVSS severity8.1
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Configuration injection in FastNetMon Community Edition 1.2.9 and earlier allows attackers to alter connected Juniper routers. The Juniper plugin interpolates argv[1] into line-delimited NETCONF set and delete commands, so embedded newlines create additional Junos commands. Reachability requires control of the plugin's IP argument; the default inet_ntoa() caller emits safe IPv4 text, while a custom wrapper or chained flaw can expose configuration at the NETCONF account's privilege level.

The record

CVE
CVE-2026-48694
Published
May 26, 2026
Updated
May 26, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, CWE-77, T1059.008
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 26, 2026CVE publishedPublication date reported by the CVE source.
  2. May 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.008Network Device CLI

Public exploit references

No public exploit references are available in this record.

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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