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TI-2026-51872 Aliases CVE-2026-73849

emlog allows unauthenticated reinstallation via `install.php?action=reinstall`.

Priority HIGH 82CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

Emlog is an open source website building system. In 2.6.26 and earlier, install.php accepts action=reinstall without authentication and deliberately skips the already-installed check because the guard runs only when $act != 'reinstall'. A remote attacker can submit hostname, dbuser, dbpasswd, dbname, dbprefix, username, password, and email values to cause file_put_contents('config.php', $config) to overwrite the configuration with attacker-controlled database settings and create a new administrator account. No fixed version is available as of this review.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00726 54th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
emlogemlogup to 2.6.26—No fix listedCNA
  • emlog Vendoremlog Affected up to 2.6.26 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:emlog:emlog:*:*:*:*:*:*:*:*——emlog
  • cpe:2.3:a:emlog:emlog:*:*:*:*:*:*:*:* Versions — — ·emlog

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-73849

References

Other 1

  • TI-2026-30598 Emlog: SQL Injection Vulnerability in log_model.php within addLog() and updateLog() Functions CVSS 4.0CRITICAL 10.0
  • TI-2025-21066 An arbitrary file upload vulnerability in the component /views/plugin.php of emlog pro… CVSS 3.1CRITICAL 9.8
  • TI-2025-19139 An arbitrary file upload vulnerability in the component admin\plugin.php of Emlog Pro… CVSS 3.1CRITICAL 9.8
  • TI-2023-24041 An arbitrary file upload vulnerability in the component /admin/plugin.php of Emlog Pro… CVSS 3.1CRITICAL 9.8
  • TI-2023-23173 Deserialization of Untrusted Data in emlog pro v.2.1.15 and earlier allows a remote… CVSS 3.1CRITICAL 9.8
  • TI-2026-18317 emlog Arbitrary File Upload Vulnerability CVSS 4.0CRITICAL 9.3
See all 105 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences