CVE-2026-84461

6.9 mediumEPSS 0.3%

Medium (6.9). EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

6.9 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-31)
CWEs: CWE-203, CWE-307, CWE-799
Published: 2026-09-25
Modified: 2026-09-28
Record from: the NVD, synced 2026-10-19

References

https://github.com/zammad/zammad/commit/d51254f1c6da13f6ee27636a5c82e53f7e59666b
https://github.com/zammad/zammad/security/advisories/GHSA-6vh5-pfp2-5rmh

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