CVE-2015-3964: SMA Solar Sunny WebBox has hardcoded passwords, which makes it easier for remote attackers to obtain access vi

This month

HIGH 10.0MITIGATE

CVE-2015-3964 is a high-severity flaw (CVSS 10.0) affecting webbox firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SMA Solar Sunny WebBox has hardcoded passwords, which makes it easier for remote attackers to obtain access via unspecified vectors.

Why this priority

Critical severity

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	3.4% (top 11%)
CISA exploited list	No
Published	2015-09-11
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: sma solar technology ag

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

Am I affected?

Timeline

2015-09-11 16:59 UTCPublished CVE record published
2026-06-17 00:26 UTCUpdated Record last modified

sma solar technology ag webbox 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-2015-3964?

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

Is CVE-2015-3964 being exploited?

CVE-2015-3964 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-2015-3964 affect?

CVE-2015-3964 affects webbox firmware. Severity is high (CVSS 10.0). SMA Solar Sunny WebBox has hardcoded passwords, which makes it easier for remote attackers to obtain access via unspecified vectors.

How urgent is CVE-2015-3964?

Priority 57/100. Critical severity

References

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