CVE-2019-20033: On Aspire-derived NEC PBXes, including all versions of SV8100 devices, a set of documented, static login crede

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CRITICAL 9.8REMOTEMITIGATE

CVE-2019-20033 is a critical-severity flaw (CVSS 9.8) affecting sv8100 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

On Aspire-derived NEC PBXes, including all versions of SV8100 devices, a set of documented, static login credentials may be used to access the DIM interface.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-287
Published	2020-07-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: nec

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

Am I affected?

Timeline

2020-07-29 18:15 UTCPublished CVE record published
2026-06-17 02:29 UTCUpdated Record last modified

nec sv8100 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

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-2019-20033?

sv8100 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-20033 being exploited?

CVE-2019-20033 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-2019-20033 affect?

CVE-2019-20033 affects sv8100 firmware. Severity is critical (CVSS 9.8). On Aspire-derived NEC PBXes, including all versions of SV8100 devices, a set of documented, static login credentials may be used to access the DIM interface.

How urgent is CVE-2019-20033?

Priority 56/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2019-20032 MEDIUM 6.5 MITIGATE MITIGATE An attacker with access to an InMail voicemail box equipped with the find me/follow me feature on Aspire-deriv
CVE-2019-20029 HIGH 8.8 MITIGATE MITIGATE An exploitable privilege escalation vulnerability exists in the WebPro functionality of Aspire-derived NEC PBX
CVE-2019-20028 HIGH 7.5 MITIGATE MITIGATE Aspire-derived NEC PBXes operating InMail software, including all versions of SV8100, SV9100, SL1100 and SL210
CVE-2019-20027 CRITICAL 9.8 MITIGATE MITIGATE Aspire-derived NEC PBXes, including the SV8100, SV9100, SL1100 and SL2100 with software releases 7.0 or higher

References

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