Is there a public exploit for CVE-2026-126781?

No public exploit for CVE-2026-126781 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-2026-126781?

CVE-2026-126781 scores CVSS 7.7 (v4.0), rated high.

What does CVE-2026-126781 affect?

CVE-2026-126781 affects Webmin Webmin.

7.7 High

Webmin through 2.670 contains a users file injection vulnerability in acl/certissue.cgi that allows authenticated Webmin users to inject…

CVE-2026-126781

Webmin through 2.670 contains a users file injection vulnerability in acl/certissue.cgi that allows authenticated Webmin users to inject lines by supplying unvalidated certificate DN fields containing newlines. Attackers can end a DN field with a backslash and newline to add a second root entry with a known password hash, gaining Webmin root access after miniserv restarts.

Assessment

CVSS: 7.7 (v4.0)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 11 November 2026
Last updated: 11 November 2026
Affected: Webmin · Webmin
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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