CVE-2026-84461 — Zammad: Missing rate limiting allows password brute-forcing during two-factor login
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, the two-factor login step let an attacker try unlimited password guesses for any account with…
Published: 2026-09-25 · CVSS: 6.9 · CVSS 4.0
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, the two-factor login step let an attacker try unlimited password guesses for any account without triggering Zammad's normal lockout or rate limiting. The response also revealed whether a guess was correct, even before two-factor authentication was checked. This made it possible to brute-force weak or reused passwords. This issue is fixed in version 7.1.2.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7