CVE-2020-27690: The Relish (Verve Connect) VH510 device with firmware before 1.0.1.6L0516 contains a buffer overflow within it

Q: How do I fix CVE-2020-27690?

verve connect vh510 firmware: upgrade to 1.0.1.6l0516. Exact commands for each OS are on this page.

Q: Is CVE-2020-27690 being exploited?

CVE-2020-27690 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-27690 affect?

CVE-2020-27690 affects verve connect vh510 firmware. Severity is medium (CVSS 5.5). 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

Q: How urgent is CVE-2020-27690?

Priority 33/100. Public exploit reference

Routine

MEDIUM 5.5UPGRADE

CVE-2020-27690 is a medium-severity flaw (CVSS 5.5) affecting verve connect vh510 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-120
Published	2020-11-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: imomobile

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-11-04 21:15 UTCPublished CVE record published
2026-06-17 03:09 UTCUpdated Record last modified

imomobile verve connect vh510 firmware UPGRADE

Affected: < 1.0.1.6l0516

Fixed in: 1.0.1.6l0516

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-27690?

verve connect vh510 firmware: upgrade to 1.0.1.6l0516. Exact commands for each OS are on this page.

Is CVE-2020-27690 being exploited?

CVE-2020-27690 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-27690 affect?

CVE-2020-27690 affects verve connect vh510 firmware. Severity is medium (CVSS 5.5). 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

How urgent is CVE-2020-27690?

Priority 33/100. Public exploit reference

Related CVEs

CVE-2020-27692 HIGH 8.8 UPGRADE The Relish (Verve Connect) VH510 device with firmware before 1.0.1.6L0516 contains multiple CSRF vulnerabiliti
CVE-2020-27691 MEDIUM 6.1 UPGRADE The Relish (Verve Connect) VH510 device with firmware before 1.0.1.6L0516 allows XSS via URLBlocking Settings,
CVE-2020-27689 CRITICAL 9.8 UPGRADE The Relish (Verve Connect) VH510 device with firmware before 1.0.1.6L0516 contains undocumented default admin

References

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