How severe is CVE-2026-102490?

CVE-2026-102490 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-102490 being actively exploited?

Yes. CVE-2026-102490 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-10-02, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-102490?

CVE-2026-102490 primarily affects Zammad. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-102490?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

When was CVE-2026-102490 published?

CVE-2026-102490 was published on 2026-09-30 and last updated on 2026-10-03.

CVE-2026-102490

CVE-2026-102490 is a critical-severity vulnerability in Zammad with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-10-02). The underlying weakness is classified as CWE-269.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.4
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-10-02)
Weakness: CWE-269
Affected product: Zammad
Published: 2026-09-30
Last modified: 2026-10-03

Description

All versions of Zammad including the latest alpha enable the local zammad user to escalate privileges to root.

Frequently asked questions

What is CVE-2026-102490?: All versions of Zammad including the latest alpha enable the local zammad user to escalate privileges to root.
How severe is CVE-2026-102490?: CVE-2026-102490 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-102490 being actively exploited?: Yes. CVE-2026-102490 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-10-02, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-102490?: CVE-2026-102490 primarily affects Zammad. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-102490?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
When was CVE-2026-102490 published?: CVE-2026-102490 was published on 2026-09-30 and last updated on 2026-10-03.

References

Affected products (2)

cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:*
cpe:2.3:a:zammad:zammad:7.1.0:alpha:*:*:*:*:*:*

More vulnerabilities in Zammad

CVE-2026-102489 — Critical (CVSS 9.8): Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the…
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CVE-2022-35490 — Critical (CVSS 9.8): Zammad 5.2.0 is vulnerable to privilege escalation. Zammad has a prevention against brute-force attacks trying to guess…
CVE-2021-42090 — Critical (CVSS 9.8): An issue was discovered in Zammad before 4.1.1. The Form functionality allows remote code execution because…
CVE-2021-42094 — Critical (CVSS 9.8): An issue was discovered in Zammad before 4.1.1. Command Injection can occur via custom Packages.
CVE-2020-26030 — Critical (CVSS 9.8): An issue was discovered in Zammad before 3.4.1. There is an authentication bypass in the SSO endpoint via a crafted…

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