How severe is CVE-2017-20021?

CVE-2017-20021 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2017-20021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-20021?

CVE-2017-20021 primarily affects Solar-log Solar-log 250 Firmware. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-20021?

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

When was CVE-2017-20021 published?

CVE-2017-20021 was published on 2022-06-09 and last updated on 2026-06-17.

CVE-2017-20021

CVE-2017-20021 is a medium-severity vulnerability in Solar-log Solar-log 250 Firmware 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-434.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 7.5
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Solar-log Solar-log 250 Firmware
Published: 2022-06-09
Last modified: 2026-06-17

Description

A vulnerability, which was classified as critical, was found in Solare Solar-Log 2.8.4-56/3.5.2-85. This affects an unknown part of the component File Upload. The manipulation leads to privilege escalation. It is possible to initiate the attack remotely. Upgrading to version 3.5.3-86 is able to address this issue. It is recommended to upgrade the affected component.

Frequently asked questions

What is CVE-2017-20021?: A vulnerability, which was classified as critical, was found in Solare Solar-Log 2.8.4-56/3.5.2-85. This affects an unknown part of the component File Upload. The manipulation leads to privilege escalation. It is possible to initiate the attack remotely. Upgrading to version 3.5.3-86 is able to address this issue. It is recommended to upgrade the affected component.
How severe is CVE-2017-20021?: CVE-2017-20021 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2017-20021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-20021?: CVE-2017-20021 primarily affects Solar-log Solar-log 250 Firmware. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-20021?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-20021 published?: CVE-2017-20021 was published on 2022-06-09 and last updated on 2026-06-17.

References

Affected products (16)

cpe:2.3:o:solar-log:solar-log_250_firmware:2.8.4-56:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_250_firmware:3.5.2-85:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_300_firmware:2.8.4-56:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_300_firmware:3.5.2-85:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_500_firmware:2.8.4-56:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_500_firmware:3.5.2-85:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_800e_firmware:2.8.4-56:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_800e_firmware:3.5.2-85:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_1000_firmware:2.8.4-56:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_1000_firmware:3.5.2-85:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_1000_pm\+_firmware:2.8.4-56:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_1000_pm\+_firmware:3.5.2-85:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_1200_firmware:2.8.4-56:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_1200_firmware:3.5.2-85:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_2000_firmware:2.8.4-56:*:*:*:*:*:*:*
cpe:2.3:o:solar-log:solar-log_2000_firmware:3.5.2-85:*:*:*:*:*:*:*

More vulnerabilities in Solar-log Solar-log 250 Firmware

CVE-2022-47767 — Critical (CVSS 9.8): A backdoor in Solar-Log Gateway products allows remote access via web panel gaining super administration privileges to…
CVE-2017-20022 — High (CVSS 7.5): A vulnerability has been found in Solare Solar-Log 2.8.4-56/3.5.2-85 and classified as problematic. This vulnerability…
CVE-2017-20025 — High (CVSS 7.3): A vulnerability was found in Solare Solar-Log 2.8.4-56/3.5.2-85. It has been declared as critical. Affected by this…
CVE-2017-20023 — Medium (CVSS 6.3): A vulnerability was found in Solare Solar-Log 2.8.4-56/3.5.2-85 and classified as critical. This issue affects some…
CVE-2017-20024 — Medium (CVSS 5.3): A vulnerability was found in Solare Solar-Log 2.8.4-56/3.5.2-85. It has been classified as problematic. Affected is an…
CVE-2017-20020 — Medium (CVSS 5.3): A vulnerability, which was classified as problematic, has been found in Solare Solar-Log 2.8.4-56/3.5.2-85. Affected by…

All CVEs affecting Solar-log Solar-log 250 Firmware →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-48283 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-48276 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-57700 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This…
CVE-2025-69129 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7…
CVE-2026-40772 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions.
CVE-2026-40412 — Critical (CVSS 10.0): Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code…

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →