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Vulnerability record · CVE-2019-19840 · published 22 January 2020

CVE-2019-19840: Ruckuswireless unleashed out-of-bounds write vulnerability

Ruckuswireless · Unleashed

A stack-based buffer overflow in zap_parse_args in zap.c in zap in Ruckus Unleashed through 200.7.10.102.64 allows remote code execution via an unauthenticated HTTP request.

9.8 CVSS 3.1 Critical EPSS 4.1% · top 9.5% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 7.5
4.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A stack-based buffer overflow in zap_parse_args in zap.c in zap in Ruckus Unleashed through 200.7.10.102.64 allows remote code execution via an unauthenticated HTTP request.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://alephsecurity.com/2020/01/14/ruckus-wireless ExploitTechnical DescriptionThird Party Advisory
https://fahrplan.events.ccc.de/congress/2019/Fahrplan/events/10816.html Third Party Advisory
https://www.ruckuswireless.com/security/299/view/txt Vendor Advisory
https://alephsecurity.com/2020/01/14/ruckus-wireless ExploitTechnical DescriptionThird Party Advisory
https://fahrplan.events.ccc.de/congress/2019/Fahrplan/events/10816.html Third Party Advisory
https://www.ruckuswireless.com/security/299/view/txt Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-22653Ruckuswireless r310 firmware improper verification of cryptographic signature vulnerabilityIn Ruckus R310 10.5.1.0.199, Ruckus R500 10.5.1.0.199, Ruckus R600 10.5.1.0.199, Ruckus T300 10.5.1.0.199, Ruckus T301n 10.5.1.0.199, Ruckus T301s 10…EPSS 0.55%9.8CVE-2020-22654Ruckuswireless r310 firmware download of code without integrity check vulnerabilityIn Ruckus R310 10.5.1.0.199, Ruckus R500 10.5.1.0.199, Ruckus R600 10.5.1.0.199, Ruckus T300 10.5.1.0.199, Ruckus T301n 10.5.1.0.199, Ruckus T301s 10…EPSS 0.34%9.8CVE-2020-22658Ruckuswireless r310 firmware download of code without integrity check vulnerabilityIn Ruckus R310 10.5.1.0.199, Ruckus R500 10.5.1.0.199, Ruckus R600 10.5.1.0.199, Ruckus T300 10.5.1.0.199, Ruckus T301n 10.5.1.0.199, Ruckus T301s 10…EPSS 0.51%9.8CVE-2019-19838Ruckuswireless unleashed os command injection vulnerabilityemfd in Ruckus Wireless Unleashed through 200.7.10.102.64 allows remote attackers to execute OS commands via a POST request with the attribute xcmd=g…EPSS 24%9.8CVE-2019-19839Ruckuswireless unleashed os command injection vulnerabilityemfd in Ruckus Wireless Unleashed through 200.7.10.102.64 allows remote attackers to execute OS commands via a POST request with the attribute xcmd=i…EPSS 3.3%9.8CVE-2019-19841Ruckuswireless unleashed os command injection vulnerabilityemfd in Ruckus Wireless Unleashed through 200.7.10.102.64 allows remote attackers to execute OS commands via a POST request with the attribute xcmd=p…EPSS 3.3%9.8CVE-2019-19842Ruckuswireless unleashed os command injection vulnerabilityemfd in Ruckus Wireless Unleashed through 200.7.10.102.64 allows remote attackers to execute OS commands via a POST request with the attribute xcmd=s…EPSS 5.0%9.8CVE-2019-19836Ruckuswireless unleashed improper input validation vulnerabilityAjaxRestrictedCmdStat in zap in Ruckus Wireless Unleashed through 200.7.10.102.64 allows remote code execution via a POST request that uses tools/_rc…EPSS 3.6%

Source: NIST National Vulnerability Database (record CVE-2019-19840), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.