CVE-2026-78617Network attack vector

Account compromise via unrestricted password guessing

Published Aug 27, 2026 · Updated Aug 27, 2026

Improper authentication-attempt restriction in WatchGuard Dimension before 2.3.1 allows remote attackers to guess user passwords. The web login endpoint neither rate-limits failed requests nor locks accounts unless the optional lockout setting is enabled. The setting is disabled by default, so network access to the login page permits automated guessing and account access when a password is found.

CVSS severity6.3
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication-attempt restriction in WatchGuard Dimension before 2.3.1 allows remote attackers to guess user passwords. The web login endpoint neither rate-limits failed requests nor locks accounts unless the optional lockout setting is enabled. The setting is disabled by default, so network access to the login page permits automated guessing and account access when a password is found.

The record

CVE
CVE-2026-78617
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
WatchGuard Technologies
Product
WatchGuard Dimension
Classifications
CWE-203, CWE-307, T1110.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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?

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

  1. Affected versionversion=2.0 <2.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WatchGuard Technologies · WatchGuard Dimensionversion=2.0 <2.3.1

Published CVSS scores

6.3WatchGuard TechnologiesCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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-203Observable Discrepancy
CWE-307Improper Restriction of Excessive Authentication Attempts
T1110.001Password Guessing

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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