What is CVE-2021-26293?

CVE-2021-26293 is a critical-severity vulnerability in Afterlogic Aurora, classified under Path Traversal. CVSS score: 9.8/10. Published 2021-03-04.

How severe is CVE-2021-26293?

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

Is CVE-2021-26293 known to be exploited?

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

Path Traversal in Afterlogic Aurora

CVE-2021-26293

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.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2021-03-04 · 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: 0.071 (94.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.071 · newest: 0.071 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-22 — Path Traversal

Public proof-of-concept exploits

References

auroramail.wordpress.com/2021/02/03/addressing-dav-related-vulnerability-in-web… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-26293?: CVE-2021-26293 is a critical-severity vulnerability in Afterlogic Aurora, classified under Path Traversal. CVSS score: 9.8/10. Published 2021-03-04.
How severe is CVE-2021-26293?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-26293 known to be exploited?: 13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.