CVE-2018-25043Public exploitNetwork attack vector

Authentication bypass via predictable PRNG

Published Jun 17, 2022 · Updated Apr 15, 2025

Improper authentication in µTorrent with unspecified affected versions allows remote attackers to bypass authentication via the PRNG. The authentication component uses predictable pseudo-random values, allowing crafted requests to obtain or forge authentication material; the public record does not identify a more specific function. Remote exploitation requires interaction with the affected web control interface and can expose or alter torrent-client data and settings.

CVSS severity8.8
High
EPSS probability1.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in µTorrent with unspecified affected versions allows remote attackers to bypass authentication via the PRNG. The authentication component uses predictable pseudo-random values, allowing crafted requests to obtain or forge authentication material; the public record does not identify a more specific function. Remote exploitation requires interaction with the affected web control interface and can expose or alter torrent-client data and settings.

The record

CVE
CVE-2018-25043
Published
Jun 17, 2022
Updated
Apr 15, 2025
Vendor
BitTorrent Limited
Product
µTorrent
Classifications
CWE-287
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

BitTorrent Limited · µTorrentversion=n/a

Published CVSS scores

5.0VulDB CNACVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
8.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication

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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