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CVE-2026-102489 is a session-hijacking vulnerability in Zammad that permits unauthenticated remote code execution in the context of the zammad user. Zammad versions 6.3.0 through 6.5.4 are vulnerable and exploitable. Versions 7.0.0 through 7.1.3 also contain the vulnerability, but environmental conditions prevent exploitation in those releases.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A CVSS 9.4 Zammad zero-day that permits unauthenticated remote code execution and user-session leakage. It was chained with a local privilege-escalation flaw during the compromise of DIVD.
One of two chained zero-day vulnerabilities in the Zammad open-source helpdesk platform used to breach DIVD. In combination with CVE-2026-102490, it enabled session hijacking, remote code execution, and escalation from a Zammad user account to root access.
One of two Zammad zero-day vulnerabilities exploited as a chain to compromise DIVD. Together, the flaws enabled session hijacking, remote code execution, and escalation from the Zammad user context to root privileges.
An unauthenticated remote code execution vulnerability in Zammad that affects versions 6.3.0 through 6.5.4. It has reportedly been actively exploited since 21 September 2026, and a security update is available.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.