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CVE-2021-34543

24
FAUCET Score

CVE-2021-34543 describes an authentication bypass vulnerability in the web administration server of Solar-Log 500 devices prior to version 2.8.2 Build 52. This flaw allows unauthenticated remote attackers to gain administrative privileges, enabling them to modify configuration files and alter system status. With a CVSS score of 7.5 (High), the vulnerability is easily exploitable over the network with low complexity and no user interaction, leading to high integrity impact. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.8.1CPE matchmatch criteria
cpe:2.3:o:bkw:solar-log_500_firmware:*:*:*:*:*:*:*:*
2.8.2CPE matchmatch criteria
cpe:2.3:o:bkw:solar-log_500_firmware:2.8.2:build_50:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.93%
Probability of exploitation in next 30 days
EPSS Percentile
85.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0293 is in the 74th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

drive.google.com / file/d/1z1TaANlDyX4SOP2vjNzkPQI3nETL9kZM/view
ExploitThird Party Advisory
exploit-db.com / exploits/49986
ExploitThird Party AdvisoryVDB Entry
solar-log.com / en/support/firmware
ProductRelease NotesVendor Advisory