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Vulnerability Intelligence

CVE-2026-102490

HighExploitedPublic exploit

Undisclosed LPE in Zammad v1.5.0 to v7.1.0-alpha

Published Sep 30, 2026 · Updated Oct 13, 2026 · Also known as EUVD-2026-90081, GHSA-hgff-g8g3-4xr8, GHSA-p97w-927q-8vxq

Key Facts

Patch immediately
  • CVE-2026-102490 is a high-severity vulnerability (CVSS 8.5 v4) affecting Zammad.
  • It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 30, 2026. Public exploit code is available.
  • EPSS estimates a 0.5% probability of exploitation in the next 30 days.
  • Fixed versions are available, including Zammad 7.1.0-alpha, Zammad 7.2.2, Zammad 7.1.0.
  • Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v4

8.5

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/AU:Y/V:D

EPSS (30-day exploit likelihood)

0.5%

Higher than 44.8% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2026-102490 brief as a PDF

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Description

Zammad packages built with packager.io (DEB and RPM) could have allowed a local attacker who already had file system write privileges as the unprivileged zammad service account to escalate to full root privileges on the host. Service processes began running as root and executed files that were owned and writable by the zammad account before dropping their identity to that account. An attacker holding that foothold could have escalated within seconds, because the affected services were restarted automatically whenever they stopped; no administrator interaction was required. Only installations from the DEB and RPM packages were affected — installations from source or the official container images were not. All released packaged versions were affected.

Known-Exploited Catalog Listings

CatalogAddedRemediation dueRansomware use
CISA KEVOct 2, 2026Oct 5, 2026Not reported
Industry KEV feedSep 30, 2026Oct 5, 2026Not reported
CIRCL KEVSep 30, 2026Oct 5, 2026Not reported
ENISA EUVDSep 30, 2026n/aNot reported

Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Affected Products

4 affected entries in total
ProductAffected versionsFixed in
ZammadZammad7.1.0-alpha, >= 1.5.07.1.0

Patched Releases

Zammad

7.1.0-alpha, 7.2.2, 7.1.0

Timeline

  1. Publicly disclosed

    Sep 30, 2026

  2. Added to Industry KEV feed

    Sep 30, 2026

  3. Added to CIRCL KEV

    Sep 30, 2026

  4. Added to ENISA EUVD

    Sep 30, 2026

  5. Added to CISA KEV

    Oct 2, 2026

  6. Last updated

    Oct 13, 2026

Weakness Type

  • CWE-269 Improper Privilege Management

References

7 more references in the full CVE brief

FAQ

Common Questions.

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