How severe is CVE-2020-23574?

CVE-2020-23574 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-23574 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-23574?

CVE-2020-23574 affects Sysax Multi Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-23574?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-23574 published?

CVE-2020-23574 was published on 2020-08-19 and last updated on 2026-06-17.

CVE-2020-23574

CVE-2020-23574 is a medium-severity vulnerability in Sysax Multi Server with a CVSS 3.x base score of 6.5. 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-119.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Sysax Multi Server
Published: 2020-08-19
Last modified: 2026-06-17

Description

When uploading a file in Sysax Multi Server 6.90, an authenticated user can modify the filename="" parameter in the uploadfile_name1.htm form to a length of 368 or more bytes. This will create a buffer overflow condition, causing the application to crash.

Frequently asked questions

What is CVE-2020-23574?: When uploading a file in Sysax Multi Server 6.90, an authenticated user can modify the filename="" parameter in the uploadfile_name1.htm form to a length of 368 or more bytes. This will create a buffer overflow condition, causing the application to crash.
How severe is CVE-2020-23574?: CVE-2020-23574 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-23574 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-23574?: CVE-2020-23574 affects Sysax Multi Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-23574?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-23574 published?: CVE-2020-23574 was published on 2020-08-19 and last updated on 2026-06-17.

References

https://www.hosaka.co.uk/2020/06/08/sysax-multi-server-buffer-overflow/

Affected products (1)

cpe:2.3:a:sysax:multi_server:6.90:*:*:*:*:*:*:*

More vulnerabilities in Sysax Multi Server

CVE-2012-10060 — Critical (CVSS 9.8): Sysax Multi Server versions prior to 5.55 contain a stack-based buffer overflow in its SSH service. When a remote…
CVE-2023-54337 — Critical (CVSS 9.1): Sysax Multi Server 6.95 contains a denial of service vulnerability in the administrative password field that allows…
CVE-2009-4790 — Critical (CVSS 9.0): Multiple directory traversal vulnerabilities in Sysax Multi Server 4.5 allow remote authenticated users to read or…
CVE-2020-13229 — High (CVSS 8.8): An issue was discovered in Sysax Multi Server 6.90. A session can be hijacked if one observes the sid value in any…
CVE-2013-10065 — High (CVSS 7.5): A denial-of-service vulnerability exists in Sysax Multi-Server version 6.10 via its SSH daemon. A specially crafted…
CVE-2024-53458 — High (CVSS 7.5): Sysax Multi Server 6.99 is vulnerable to a denial of service (DoS) condition when processing specially crafted SSH…

All CVEs affecting Sysax Multi Server →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-105285 — Critical (CVSS 10.0): A security vulnerability has been detected in Totolink A3002MU 1.0.0-B20230403.1455. This affects an unknown function…
CVE-2026-104610 — Critical (CVSS 10.0): A security vulnerability has been detected in Tenda HG7, HG9 and HG10 300001138_en_xpon. This impacts the function…
CVE-2026-101039 — Critical (CVSS 10.0): A vulnerability was identified in FAST FAC1900R 20190827_2.0.2. Affected by this issue is the function copy_msg_element…
CVE-2026-96257 — Critical (CVSS 10.0): A flaw has been found in Fast FAC1203R Gigabit Edition 2.0.4. Affected by this issue is the function copy_msg_element…
CVE-2026-94089 — Critical (CVSS 10.0): A vulnerability was determined in D-Link DIR-868L 2.01b05. This issue affects the function strcpy of the file…
CVE-2026-94003 — Critical (CVSS 10.0): A vulnerability has been found in Comfast CF-N1-S 2.6.0.1. Impacted is the function get_css_path_from_uri of the file…

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →