CVE-2024-34340Public exploitNetwork attack vector

Account takeover via loose MD5 comparison

Published May 13, 2024 · Updated Nov 4, 2025

Authentication bypass in Cacti before 1.2.27 allows remote attackers to access accounts whose legacy MD5 password hashes resemble numbers. The compat_password_verify function compares attacker-supplied MD5 output to a stored hash with PHP's loose equality operator, coercing 0e-prefixed hashes to zero. Exploitation requires a target account with a legacy numeric-form MD5 hash and grants that account's Cacti privileges.

CVSS severity9.1
Critical
EPSS probability1.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Cacti before 1.2.27 allows remote attackers to access accounts whose legacy MD5 password hashes resemble numbers. The compat_password_verify function compares attacker-supplied MD5 output to a stored hash with PHP's loose equality operator, coercing 0e-prefixed hashes to zero. Exploitation requires a target account with a legacy numeric-form MD5 hash and grants that account's Cacti privileges.

The record

CVE
CVE-2024-34340
Published
May 13, 2024
Updated
Nov 4, 2025
Vendor
The Cacti Group
Product
Cacti
Classifications
CWE-287, CWE-697, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record 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=0 <1.2.27
  2. Affected versionversion=< 1.2.27

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Cacti Group · Cactiversion=0 <1.2.27; version=< 1.2.27

Published CVSS scores

9.1GitHub CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
4.2Cacti GitHub Security AdvisoryCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/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 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 exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-697Incorrect Comparison
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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