CVE-2025-62774Public exploit

Session hijacking via timestamp-derived cookies

Published Oct 22, 2025 · Updated Oct 22, 2025

Authentication weakness in Mercku M6a 2.1.0 and earlier allows remote attackers to hijack administrator sessions over the local network. Session cookies are formed as s followed by a Unix timestamp, and the management endpoint accepts guessed values without rate limiting. The attack requires local-network access and an active administrator session; the demonstrated result is access to authenticated management data.

CVSS severity3.1
Low
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication weakness in Mercku M6a 2.1.0 and earlier allows remote attackers to hijack administrator sessions over the local network. Session cookies are formed as s followed by a Unix timestamp, and the management endpoint accepts guessed values without rate limiting. The attack requires local-network access and an active administrator session; the demonstrated result is access to authenticated management data.

The record

CVE
CVE-2025-62774
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
Mercku
Product
M6a
Classifications
CWE-331, T1550.004
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:L/I:N/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-331Insufficient Entropy
T1550.004Use Alternate Authentication Material: Web Session Cookie

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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