CVE-2026-73849Public exploitNetwork attack vectorHinoki check available

Site takeover via unauthenticated reinstallation

Published Aug 14, 2026 · Updated Aug 14, 2026

Missing authentication in install.php in emlog 2.6.26 and earlier allows remote attackers to take over sites via reinstallation. The reinstall action bypasses the installed-system guard, accepts attacker-supplied database and administrator fields, overwrites config.php, and creates a new administrator account. Remote reachability of install.php is sufficient to replace the site database configuration and obtain administrative control without credentials or user interaction.

CVSS severity9.8
Critical
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authentication in install.php in emlog 2.6.26 and earlier allows remote attackers to take over sites via reinstallation. The reinstall action bypasses the installed-system guard, accepts attacker-supplied database and administrator fields, overwrites config.php, and creates a new administrator account. Remote reachability of install.php is sufficient to replace the site database configuration and obtain administrative control without credentials or user interaction.

The record

CVE
CVE-2026-73849
Published
Aug 14, 2026
Updated
Aug 14, 2026
Vendor
emlog
Product
emlog
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 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=<= 2.6.26

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

emlog · emlogversion=<= 2.6.26

Published CVSS scores

9.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

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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