CVE-2025-62772Public exploit

Management access via nonexpiring session tokens

Published Oct 22, 2025 · Updated Oct 22, 2025

Authentication bypass in Mercku M6a 2.1.0 and earlier allows remote attackers to reuse stale session tokens for management access. The web interface accepted a 2020 session cookie for an authenticated API request in 2024, showing that token validation does not enforce expiration. An attacker must reach the management interface and obtain or forge a previously valid token; default exposure is limited to the local network.

CVSS severity3.1
Low
EPSS probability0.15%
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 Mercku M6a 2.1.0 and earlier allows remote attackers to reuse stale session tokens for management access. The web interface accepted a 2020 session cookie for an authenticated API request in 2024, showing that token validation does not enforce expiration. An attacker must reach the management interface and obtain or forge a previously valid token; default exposure is limited to the local network.

The record

CVE
CVE-2025-62772
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
Mercku
Product
M6a
Classifications
CWE-305, T1078
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 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 <=2.1.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Mercku · M6aversion=0 <=2.1.0

Published CVSS scores

3.1MITRECVSS:3.1/AV:A/AC:H/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-305Authentication Bypass by Primary Weakness
T1078Valid Accounts

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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