CVE-2024-42657Network attack vector

Credential disclosure via plaintext login transmission

Published Aug 19, 2024 · Updated Aug 20, 2024

Missing transport encryption in Nepstech NTPL-XPON1GFEVN Firmware 1.0 allows man-in-the-middle attackers to capture login credentials over HTTP. The router management login transmits usernames and passwords through an unencrypted HTTP connection rather than protecting them with HTTPS. An attacker able to intercept management traffic can reuse the captured credentials to access the router interface; no integrity or service-interruption impact is reported.

CVSS severity7.5
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing transport encryption in Nepstech NTPL-XPON1GFEVN Firmware 1.0 allows man-in-the-middle attackers to capture login credentials over HTTP. The router management login transmits usernames and passwords through an unencrypted HTTP connection rather than protecting them with HTTPS. An attacker able to intercept management traffic can reuse the captured credentials to access the router interface; no integrity or service-interruption impact is reported.

The record

CVE
CVE-2024-42657
Published
Aug 19, 2024
Updated
Aug 20, 2024
Vendor
Nepstech
Product
NTPL-XPON1GFEVN Firmware
Classifications
CWE-311, CWE-200, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=v1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nepstech · NTPL-XPON1GFEVN Firmwareversion=v1.0

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-311Missing Encryption of Sensitive Data
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1557Adversary-in-the-Middle

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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