CVE-2026-102490

Zammad privilege escalation, confirmed exploited in the wild.

Zammad GmbH Zammad contains an improper privilege management vulnerability that can allow the local zammad user to escalate privileges to root. This vulnerability can be chained with CVE-2026-102489.

Check your domain free How we watch for this

11%chance of exploitation in the next 30 days (EPSS), 95th percentile

2 Octadded to CISA's Known Exploited Vulnerabilities list, 2026

5 Octfederal remediation deadline, already passed

Passedpast the deadline: patch now

CISA's name for it	Zammad GmbH Zammad Improper Privilege Management Vulnerability
Vendor and product	Zammad GmbH · Zammad
Type	privilege escalation · CWE-269
Exploited	Confirmed by CISA listed 2 October 2026
Likelihood	one of the most likely to be exploited of every vulnerability tracked
Deadline	5 October 2026 · already passed
Used in ransomware	Not reported
Advisories	zammad.com ↗ · community.zammad.org ↗ · www.cisa.gov ↗ · www.cisa.gov ↗

What to do

Three steps, in this order

Step 1

Install the update on every affected system, servers and workstations alike.

Step 2

Escalation bugs are chained after a first foothold: check for other exposures an attacker could start from.

Step 3

Review who holds administrative rights, and alert on new ones.

CISA's 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.

CISA's 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.

Is it on your estate?

Know before someone else finds it

Threat Landscape Monitoring fingerprints the software your internet-facing hosts disclose and matches it, every day, against this list and the exploitation scores. When a new entry touches something you run, you are told once, with the host and the fix. The free plan covers one domain.

Start free with one domain Run the free domain check

Questions

CVE-2026-102490 in short

Is CVE-2026-102490 being exploited?

Yes. CISA added CVE-2026-102490 to its Known Exploited Vulnerabilities catalogue on 2 October 2026, which it does only on evidence of exploitation in the wild.

What is the CISA deadline for CVE-2026-102490?

US federal agencies must remediate it by 5 October 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.

How likely is CVE-2026-102490 to be exploited in the next 30 days?

FIRST's Exploit Prediction Scoring System gives it 11%, the 95th percentile of every CVE it scores.

How do I fix CVE-2026-102490?

Install the update on every affected system, servers and workstations alike. Escalation bugs are chained after a first foothold: check for other exposures an attacker could start from. Review who holds administrative rights, and alert on new ones.

Same vendor

Other Zammad GmbH vulnerabilities being exploited

CVE	Product	Type	Listed
CVE-2026-102489	Zammad	remote code execution	2 October 2026

Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.