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CVE-2023-53962: SOUND4 IMPACT/FIRST/PULSE/Eco v2.x contains an unauthenticated directory traversal vulnerability that allows r

53
This week
HIGH 7.5REMOTEMITIGATEMITIGATEMITIGATE

CVE-2023-53962 is a high-severity flaw (CVSS 7.5) affecting impact firmware, pulse firmware, first firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SOUND4 IMPACT/FIRST/PULSE/Eco v2.x contains an unauthenticated directory traversal vulnerability that allows remote attackers to write arbitrary files through the 'upgfile' parameter in upload.cgi. Attackers can exploit the vulnerability by sending crafted multipart form-data POST requests with directory traversal sequences to write files to unintended system locations.

Why this priority

  • High severity
  • Public exploit reference
  • Remotely exploitable, no login, no user action

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

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance1.2% (top 31%)
CISA exploited listNo
WeaknessCWE-22
Published2025-12-22
Last modified2026-06-17
Publisher (CNA): VulnCheck · Vendor: sound4

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

Am I affected?

Timeline

sound4 impact firmware MITIGATE
Affected: 2.15 · 1.69
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.69
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.
sound4 pulse firmware MITIGATE
Affected: 2.15 · 1.69
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.69
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.
sound4 first firmware MITIGATE
Affected: 2.15 · 1.69
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.69
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.
sound4 stream extension DOWNGRADE
Affected: 2.4.29
Fixed in: no fixed release known
Safe to downgrade to: a release before 2.4.29
1. Check installed version
apt-cache policy stream-extension || rpm -q stream-extension || stream-extension --version
2. No fixed release: DOWNGRADE to a release before 2.4.29 (Debian / Ubuntu)
apt-cache madison stream-extension sudo apt install stream-extension=<VERSION_BEFORE_2.4.29> sudo apt-mark hold stream-extension
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list stream-extension sudo dnf downgrade stream-extension-<VERSION_BEFORE_2.4.29> sudo dnf versionlock add stream-extension
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
sound4 wm2 firmware MITIGATE
Affected: 1.11
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.11
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.
sound4 big voice2 firmware MITIGATE
Affected: 1.30
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.30
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-2023-53962?

impact firmware: mitigate or apply the listed mitigation; pulse firmware: mitigate or apply the listed mitigation; first firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-53962 being exploited?

CVE-2023-53962 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-2023-53962 affect?

CVE-2023-53962 affects impact firmware, pulse firmware, first firmware. Severity is high (CVSS 7.5). SOUND4 IMPACT/FIRST/PULSE/Eco v2.x contains an unauthenticated directory traversal vulnerability that allows remote attackers to write arbitrary files through the 'upgfile' parameter in upload.cgi. Attackers can exploit the vulnerability by

How urgent is CVE-2023-53962?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

References

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