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CVE-2017-20021

31
FAUCET Score

CVE-2017-20021 is a critical privilege escalation vulnerability affecting Solare Solar-Log versions 2.8.4-56 and 3.5.2-85, specifically within an unspecified file upload component. This flaw allows for remote, unauthenticated attackers to gain elevated privileges with high impact to confidentiality, integrity, and availability. While rated with a CVSS score of 9.8 (Critical), there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability. Organizations using affected versions are strongly advised to upgrade to version 3.5.3-86 to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
2.8.4-56CPE matchmatch criteria
cpe:2.3:o:solar-log:solar-log_250_firmware:2.8.4-56:*:*:*:*:*:*:*
3.5.2-85CPE matchmatch criteria
cpe:2.3:o:solar-log:solar-log_250_firmware:3.5.2-85:*:*:*:*:*:*:*
2.8.4-56CPE matchmatch criteria
cpe:2.3:o:solar-log:solar-log_300_firmware:2.8.4-56:*:*:*:*:*:*:*
3.5.2-85CPE matchmatch criteria
cpe:2.3:o:solar-log:solar-log_300_firmware:3.5.2-85:*:*:*:*:*:*:*
2.8.4-56CPE matchmatch criteria
cpe:2.3:o:solar-log:solar-log_500_firmware:2.8.4-56:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.97%
Probability of exploitation in next 30 days
EPSS Percentile
58.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0097 is in the 43rd percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

seclists.org / fulldisclosure/2017/Mar/58
ExploitMailing ListThird Party Advisory
vuldb.com
Third Party Advisory