CVE-2026-76340Network attack vector

Unauthorized token-key reload via REST API

Published Aug 19, 2026 · Updated Aug 19, 2026

Missing authorization in Splunk Enterprise 10.4 before 10.4.2 allows remote attackers to reload token-signing keys via the REST API. The token-key reload action is exposed through a REST endpoint that enforces neither authentication nor the change_authentication capability before invoking the reload operation. Reachability requires network access to the affected management API, and the published impact is limited to forcing the reload action rather than reading key material or executing code.

CVSS severity5.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Splunk Enterprise 10.4 before 10.4.2 allows remote attackers to reload token-signing keys via the REST API. The token-key reload action is exposed through a REST endpoint that enforces neither authentication nor the change_authentication capability before invoking the reload operation. Reachability requires network access to the affected management API, and the published impact is limited to forcing the reload action rather than reading key material or executing code.

The record

CVE
CVE-2026-76340
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Zoom Video Communications, Inc.
Product
Splunk Enterprise
Classifications
CWE-862
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=10.4 <10.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zoom Video Communications, Inc. · Splunk Enterpriseversion=10.4 <10.4.2

Published CVSS scores

5.3Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

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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