Is there a public exploit for CVE-2026-123620?

No public exploit for CVE-2026-123620 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-123620?

CVE-2026-123620 scores CVSS 7.7 (v4.0), rated high. EPSS puts the chance of exploitation in the next 30 days at 1.38%.

What does CVE-2026-123620 affect?

CVE-2026-123620 affects Webmin Usermin.

7.7 High

Usermin through 2.570 contains an OS command injection vulnerability in the Read Mail module that allows authenticated users to execute…

CVE-2026-123620

Usermin through 2.570 contains an OS command injection vulnerability in the Read Mail module that allows authenticated users to execute commands through unsanitized IMAP folder names. Attackers can create a folder containing shell metacharacters via an external IMAP client, then delete it in Usermin to run commands as their system account, bypassing webmail-only restrictions.

Assessment

CVSS: 7.7 (v4.0)
Severity: High
EPSS: 1.38% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 6 November 2026
Last updated: 9 November 2026
Affected: Webmin · Usermin
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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