What is the CVSS score of CVE-2021-34543?

CVE-2021-34543 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 2.9%.

Is there a public PoC exploit available for CVE-2021-34543?

Yes, a public proof-of-concept exploit is available for CVE-2021-34543. Prioritise patching immediately. EPSS: 2.9%.

Solar Log 500 Firmware CVE-2021-34543

HIGH

Missing Authentication for Critical Function (CWE-306)

2021-12-07 cve@mitre.org

Authentication Bypass Solar Log 500 Firmware

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

None

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Dec 07, 2021 - 21:15 nvd

HIGH 7.5

DescriptionNVD

The web administration server in Solar-Log 500 before 2.8.2 Build 52 does not require authentication, which allows remote attackers to gain administrative privileges by connecting to the server. As a result, the attacker can modify configuration files and change the system status. Fixed with 3.0.0-60 11.10.2013 for SL 200, 500, 1000 / not existing for SL 250, 300, 1200, 2000, SL 50 Gateway, SL Base.

AnalysisAI

The web administration server in Solar-Log 500 before 2.8.2 Build 52 does not require authentication, which allows remote attackers to gain administrative privileges by connecting to the server. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Missing Authentication for Critical Function (CWE-306), which allows attackers to access critical functionality without authentication. The web administration server in Solar-Log 500 before 2.8.2 Build 52 does not require authentication, which allows remote attackers to gain administrative privileges by connecting to the server. As a result, the attacker can modify configuration files and change the system status. Fixed with 3.0.0-60 11.10.2013 for SL 200, 500, 1000 / not existing for SL 250, 300, 1200, 2000, SL 50 Gateway, SL Base. Affected products include: Bkw Solar-Log 500 Firmware. Version information: before 2.8.2.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Require authentication for all sensitive operations, implement defense in depth.