6.3

CVE-2026-78617: watchguard dimension Observable Discrepancy

CVSS: 6.3v4.0MediumDeferred
Published 27-08-2026Last modified 28-08-2026
Open JSON

Vulnerability summary

CVE-2026-78617 is a medium (CVSS 6.3) Observable Discrepancy vulnerability in watchguard dimension. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 34.7% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.3/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.41%
0%100%
Low · +0.09 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 27-08-2026
    PublishedVulnerability first disclosed.
  2. 28-08-2026
    Last modifiedVulnerability information updated.

Description

WatchGuard Dimension's web login endpoint does not enforce effective rate-limiting or account lockout by default allowing a remote attacker to perform automated password guessing against user accounts. If the account lockout setting is enabled, brute-force attempts are blocked after a defined number of failed attempts, but this setting is not enabled by default.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

+0.09 pp

From 0.32% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.41%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Watchguard1 product

1 vendor · 1 product

References

1 links