How severe is CVE-2023-42000?

CVE-2023-42000 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-42000 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-42000?

CVE-2023-42000 affects Arcserve Udp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-42000?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-42000 published?

CVE-2023-42000 was published on 2023-11-27 and last updated on 2026-06-17.

CVE-2023-42000

CVE-2023-42000 is a critical-severity vulnerability in Arcserve Udp with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Arcserve Udp
Published: 2023-11-27
Last modified: 2026-06-17

Description

Arcserve UDP prior to 9.2 contains a path traversal vulnerability in com.ca.arcflash.ui.server.servlet.FileHandlingServlet.doUpload(). An unauthenticated remote attacker can exploit it to upload arbitrary files to any location on the file system where the UDP agent is installed.

Frequently asked questions

What is CVE-2023-42000?: Arcserve UDP prior to 9.2 contains a path traversal vulnerability in com.ca.arcflash.ui.server.servlet.FileHandlingServlet.doUpload(). An unauthenticated remote attacker can exploit it to upload arbitrary files to any location on the file system where the UDP agent is installed.
How severe is CVE-2023-42000?: CVE-2023-42000 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-42000 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-42000?: CVE-2023-42000 affects Arcserve Udp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-42000?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-42000 published?: CVE-2023-42000 was published on 2023-11-27 and last updated on 2026-06-17.

References

https://www.tenable.com/security/research/tra-2023-37

Affected products (1)

cpe:2.3:a:arcserve:udp:*:*:*:*:*:*:*:*

More vulnerabilities in Arcserve Udp

CVE-2025-34523 — Critical (CVSS 9.8): A heap-based buffer overflow vulnerability exists in the network-facing input handling routines of Arcserve Unified…
CVE-2025-34522 — Critical (CVSS 9.8): A heap-based buffer overflow vulnerability exists in the input parsing logic of Arcserve Unified Data Protection (UDP).…
CVE-2025-34520 — Critical (CVSS 9.8): An authentication bypass vulnerability in Arcserve Unified Data Protection (UDP) allows unauthenticated attackers to…
CVE-2024-0799 — Critical (CVSS 9.8): An authentication bypass vulnerability exists in Arcserve Unified Data Protection 9.2 and 8.1 in the…
CVE-2023-41999 — Critical (CVSS 9.8): An authentication bypass exists in Arcserve UDP prior to version 9.2. An unauthenticated, remote attacker can obtain a…
CVE-2023-41998 — Critical (CVSS 9.8): Arcserve UDP prior to 9.2 contained a vulnerability in the com.ca.arcflash.rps.webservice.RPSService4CPMImpl…

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