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Vulnerability record · CVE-2021-26758 · published 7 April 2021

CVE-2021-26758: Litespeedtech openlitespeed improper privilege management vulnerability

Litespeedtech · Openlitespeed

Privilege Escalation in LiteSpeed Technologies OpenLiteSpeed web server version 1.7.8 allows attackers to gain root terminal access and execute commands on the host system.

8.8 CVSS 3.1 High EPSS 2.7% · top 14.6% CWE-269 · Improper privilege management
8.8CVSS 3.1 base score, v2 9.0
2.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 6 tagged exploit
17 Jun 2026Last modified by NVD

Description

Privilege Escalation in LiteSpeed Technologies OpenLiteSpeed web server version 1.7.8 allows attackers to gain root terminal access and execute commands on the host system.

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

Affected products

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

References

LinkTags
https://docs.unsafe-inline.com/0day/openlitespeed-web-server-1.7.8-command-injection-to-privilege-escalation-cve-2021-26 ExploitThird Party Advisory
https://github.com/litespeedtech/openlitespeed/issues/217 ExploitThird Party Advisory
https://www.exploit-db.com/exploits/49556 ExploitThird Party AdvisoryVDB Entry
https://docs.unsafe-inline.com/0day/openlitespeed-web-server-1.7.8-command-injection-to-privilege-escalation-cve-2021-26 ExploitThird Party Advisory
https://github.com/litespeedtech/openlitespeed/issues/217 ExploitThird Party Advisory
https://www.exploit-db.com/exploits/49556 ExploitThird Party AdvisoryVDB Entry

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2021-26758), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.