CVE-2025-43960Public exploitNetwork attack vector

Service crash via oversized serialized Monolog payload

Published Aug 25, 2025 · Updated Aug 25, 2025

Deserialization of untrusted data in Adminer 4.8.1 allows remote attackers to exhaust server memory via a crafted Monolog serialized payload. The Monolog logging integration unserializes an attacker-supplied object whose declared one-billion-byte string length drives excessive allocation. The interface can become unresponsive, and concurrent unauthenticated requests can crash the server until manual intervention.

CVSS severity8.6
High
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in Adminer 4.8.1 allows remote attackers to exhaust server memory via a crafted Monolog serialized payload. The Monolog logging integration unserializes an attacker-supplied object whose declared one-billion-byte string length drives excessive allocation. The interface can become unresponsive, and concurrent unauthenticated requests can crash the server until manual intervention.

The record

CVE
CVE-2025-43960
Published
Aug 25, 2025
Updated
Aug 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-502, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

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-502Deserialization of Untrusted Data
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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