Exploited. On CISA's list since 2022-03-25.

Arcserve Unified Data Protection (UDP) Directory Traversal Vulnerability

CVE-2015-4068 · Arcserve Unified Data Protection (UDP) · Published 2015-05-29

How bad would it be?

9.1 out of 10

CVSS rates it critical: about as damaging as flaws get.

How likely is it to be used?

64%

Estimated chance of exploitation in the next 30 days, among the top 1% of all scored flaws (EPSS, 2026-10-29).

Is it already being used?

Yes

CISA has seen it exploited in real attacks. For US government agencies the fix is deadline passed 1659 days ago (2022-04-15).

What CISA says to do

Apply updates per vendor instructions.

Directory traversal vulnerability in Arcserve UDP allows remote attackers to obtain sensitive information or cause a denial of service.

nvd.nist.gov

What the flaw is

Directory traversal vulnerability in Arcserve UDP before 5.0 Update 4 allows remote attackers to obtain sensitive information or cause a denial of service via a crafted file path to the (1) reportFileServlet or (2) exportServlet servlet.

From the NVD.

Fixes and advisories

documentation.arcserve.comVendor Advisory
documentation.arcserve.comVendor Advisory

Learn this

Explore this week’s weaknesses and all learning topics

Understand the kind of weakness behind this flaw. These resources teach the weakness, rather than reproduce this specific CVE. Follow the vendor's advice above to fix the affected product.

Path traversal

A supplied file path escapes the directory the application intended to allow.

CWE-22 · CISA KEV; NVD record: 134c704f-9b21-4f2e-91b3-4a467353bcc0; NVD record: nvd@nist.gov

Reading and practice labs · Free account for labs. Basic HTTP knowledge; some labs use Burp Suite.

Explore the labs at PortSwigger Web Security Academy How it is prevented

CWE is a catalogue of weakness types. Labels come from the sources shown and can differ or change. Resource matches reviewed 16 October 2026.

On SentryFeed

No story in the last 14 days has mentioned it.

Exploited flaws from CISA's KEV catalogue. Chance of exploitation from EPSS by FIRST. Descriptions and scores from the NVD. This product uses the NVD API but is not endorsed or certified by the NVD.