What is the CVSS score of CVE-2020-27690?

CVE-2020-27690 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.4%.

Is there a public PoC exploit available for CVE-2020-27690?

Yes, a public proof-of-concept exploit is available for CVE-2020-27690. Prioritise patching immediately. EPSS: 0.4%.

Verve Connect Vh510 Firmware CVE-2020-27690

MEDIUM

Classic Buffer Overflow (CWE-120)

2020-11-04 cve@mitre.org

Buffer Overflow Verve Connect Vh510 Firmware

5.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Nov 04, 2020 - 21:15 nvd

MEDIUM 5.5

DescriptionNVD

The Relish (Verve Connect) VH510 device with firmware before 1.0.1.6L0516 contains a buffer overflow within its web management portal. When a POST request is sent to /boaform/admin/formDOMAINBLK with a large blkDomain value, the Boa server crashes.

AnalysisAI

The Relish (Verve Connect) VH510 device with firmware before 1.0.1.6L0516 contains a buffer overflow within its web management portal. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. The Relish (Verve Connect) VH510 device with firmware before 1.0.1.6L0516 contains a buffer overflow within its web management portal. When a POST request is sent to /boaform/admin/formDOMAINBLK with a large blkDomain value, the Boa server crashes. Affected products include: Imomobile Verve Connect Vh510 Firmware. Version information: before 1.0.1.6.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.