MEDIUM
CVE-2020-27690
CWE-120Published: November 4, 2020· Updated: Jun 17, 2026
5.5
CVSS v3.1
Official Description
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.
Technical Analysis
CVE-2020-27690 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
imomobile2 product(s)
verve connect vh510 firmwareverve connect vh510
Source: NVD CPE · 2 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (4)
→
https://6point6.co.uk/insights/security-advisory-relish-4g-hub-vh510/Third Party Advisory
→
https://6point6.co.uk/wp-content/uploads/2020/10/Relish-4G-VH510-Hub-Full-Disclosure-v1.3.pdfExploit · Third Party Advisory
→
https://6point6.co.uk/insights/security-advisory-relish-4g-hub-vh510/Third Party Advisory
→
https://6point6.co.uk/wp-content/uploads/2020/10/Relish-4G-VH510-Hub-Full-Disclosure-v1.3.pdfExploit · Third Party Advisory
Quick Facts
CVE IDCVE-2020-27690
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-120
CISA KEVNo
Affected1 vendor(s)
PublishedNov 4, 2020
Related CVEs (CWE-120)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-27690 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.