How severe is CVE-2020-3927?

CVE-2020-3927 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-3927 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3927?

CVE-2020-3927 affects Changingtec Servisign. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-3927?

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

When was CVE-2020-3927 published?

CVE-2020-3927 was published on 2020-02-03 and last updated on 2026-06-17.

CVE-2020-3927

CVE-2020-3927 is a high-severity vulnerability in Changingtec Servisign with a CVSS 3.x base score of 8.3. 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-552.

Key facts

Severity: High (CVSS 3.x base score 8.3)
CVSS v2: 8.5
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-552
Affected product: Changingtec Servisign
Published: 2020-02-03
Last modified: 2026-06-17

Description

An arbitrary-file-access vulnerability exists in ServiSign security plugin, as long as the attackers learn the specific API function, they may access arbitrary files on target system via crafted API parameter.

Frequently asked questions

What is CVE-2020-3927?: An arbitrary-file-access vulnerability exists in ServiSign security plugin, as long as the attackers learn the specific API function, they may access arbitrary files on target system via crafted API parameter.
How severe is CVE-2020-3927?: CVE-2020-3927 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-3927 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3927?: CVE-2020-3927 affects Changingtec Servisign. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-3927?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-3927 published?: CVE-2020-3927 was published on 2020-02-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:changingtec:servisign:*:*:*:*:*:*:*:*

More vulnerabilities in Changingtec Servisign

CVE-2022-46306 — High (CVSS 8.8): ChangingTec ServiSign component has a path traversal vulnerability due to insufficient filtering for special characters…
CVE-2022-46304 — High (CVSS 8.8): ChangingTec ServiSign component has insufficient filtering for special characters in the connection response parameter.…
CVE-2020-3925 — High (CVSS 8.3): A Remote Code Execution(RCE) vulnerability exists in some designated applications in ServiSign security plugin, as long…
CVE-2022-46305 — Medium (CVSS 6.5): ChangingTec ServiSign component has a path traversal vulnerability. An unauthenticated LAN attacker can exploit this…
CVE-2020-3926 — Medium (CVSS 6.1): An arbitrary-file-access vulnerability exists in ServiSign security plugin, as long as the attackers learn the specific…

All CVEs affecting Changingtec Servisign →

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