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% (59th 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% (59th 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% (59th 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:*:*:*:*:*:*:*

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