CVE-2021-26293

Name: CVE-2021-26293
Creator: NVD / NIST
Published: 2021-03-04T21:15:13.883+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 7.11%

Last modified Jun 17, 2026

CVE-2021-26293 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in AfterLogic Aurora through 8.5.3 and WebMail Pro through 8.5.3, when DAV is enabled. They allow directory traversal to create new files (such as an executable file under the web root). EPSS estimates a 7.11% chance of exploitation in the next 30 days.

Description

An issue was discovered in AfterLogic Aurora through 8.5.3 and WebMail Pro through 8.5.3, when DAV is enabled. They allow directory traversal to create new files (such as an executable file under the web root). This is related to DAVServer.php in 8.x and DAV/Server.php in 7.x.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

7.11%

93.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Afterlogic	Aurora	<= 8.5.3
Afterlogic	Webmail Pro	<= 8.5.3

References

https://auroramail.wordpress.com/2021/02/03/addressing-dav-related-vulnerability-in-webmail-and-aurora/Exploit, Third Party Advisory
https://auroramail.wordpress.com/2021/02/03/addressing-dav-related-vulnerability-in-webmail-and-aurora/Exploit, Third Party Advisory

Timeline

Published: Mar 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26293?

How severe is CVE-2021-26293?

CVE-2021-26293 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 7.11% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26293?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26293?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST