What is CVE-2019-20504?

CVE-2019-20504 is a critical-severity vulnerability in Quest Kace Systems Management, classified under OS Command Injection. CVSS score: 9.8/10. Published 2020-03-09.

How severe is CVE-2019-20504?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2019-20504 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Quest Kace Systems Management

CVE-2019-20504

service/krashrpt.php in Quest KACE K1000 Systems Management Appliance before 6.4 SP3 (6.4.120822) allows a remote attacker to execute code via shell metacharacters in the kuid parameter.

Vulnerability class: Command Injection (OS Command Injection)

Published 2020-03-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.096 (95.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.096 · newest: 0.096 · change: 0.000

Affected products

Quest Kace Systems Management

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

References

www.rcesecurity.com/2019/04/dell-kace-k1000-remote-code-execution-the-story-of-… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-20504?: CVE-2019-20504 is a critical-severity vulnerability in Quest Kace Systems Management, classified under OS Command Injection. CVSS score: 9.8/10. Published 2020-03-09.
How severe is CVE-2019-20504?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-20504 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.