Is there a public exploit for CVE-2026-121434?

No public exploit for CVE-2026-121434 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-2026-121434?

CVE-2026-121434 scores CVSS 5.3 (v4.0), rated medium.

What does CVE-2026-121434 affect?

CVE-2026-121434 affects froxlor Froxlor.

5.3 Medium

Froxlor 2.3.0 before 2.3.15 contains a missing authorization check in the Certificates.add and Certificates.update API commands, which do…

CVE-2026-121434

Froxlor 2.3.0 before 2.3.15 contains a missing authorization check in the Certificates.add and Certificates.update API commands, which do not verify whether a domain's certificate is Let's Encrypt-managed. Customers with API access can overwrite the managed certificate and private key with an attacker-chosen pair, which a REBUILDVHOST task deploys to the webserver, breaking HTTPS and desynchronizing ACME automation.

Assessment

CVSS: 5.3 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 3 November 2026
Last updated: 3 November 2026
Affected: froxlor · Froxlor
Assigner: VulnCheck

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

At the source

EUVD (ENISA)

References

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