CVE-2021-26267Network attack vector

Suspension bypass via legacy MySQL password hashes

Published Jan 26, 2021 · Updated Aug 3, 2024

Improper suspension enforcement in cPanel before 92.0.9 allows remote authenticated users with old-style MySQL hashes to retain database access. The vendor and CNA records do not disclose which suspension-control locus mishandles legacy password hashes or how the check fails. Exploitation requires a suspended MySQL account using the legacy hash format and bypasses only the intended suspension restriction.

CVSS severity7.5
High
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper suspension enforcement in cPanel before 92.0.9 allows remote authenticated users with old-style MySQL hashes to retain database access. The vendor and CNA records do not disclose which suspension-control locus mishandles legacy password hashes or how the check fails. Exploitation requires a suspended MySQL account using the legacy hash format and bypasses only the intended suspension restriction.

The record

CVE
CVE-2021-26267
Published
Jan 26, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

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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