CVE-2023-27355: This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of So

Q: How do I fix CVE-2023-27355?

one firmware: mitigate or apply the listed mitigation; s1: upgrade to 11.7.1; s2: upgrade to 15.1. Exact commands for each OS are on this page.

Q: Is CVE-2023-27355 being exploited?

CVE-2023-27355 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-2023-27355 affect?

CVE-2023-27355 affects one firmware, s1, s2. Severity is high (CVSS 8.8). This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Sonos One Speaker 70.3-35220. Authentication is not required to exploit this vulnerability. The specific flaw exists within the MPEG

This month

HIGH 8.8MITIGATEUPGRADEUPGRADE

CVE-2023-27355 is a high-severity flaw (CVSS 8.8) affecting one firmware, s1, s2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Sonos One Speaker 70.3-35220. Authentication is not required to exploit this vulnerability. The specific flaw exists within the MPEG-TS parser. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to exec

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-121
Published	2023-04-20
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: sonos

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

Am I affected?

Timeline

2023-04-20 22:15 UTCPublished CVE record published
2026-06-17 05:44 UTCUpdated Record last modified

sonos one firmware MITIGATE

Affected: 70.3-35220

Fixed in: no fixed release known

Safe to downgrade to: a release before 70.3-35220

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.

sonos s1 UPGRADE

Affected: < 11.7.1

Fixed in: 11.7.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy s1 || rpm -q s1 || s1 --version

2. UPGRADE to 11.7.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade s1

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade s1

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

sonos s2 UPGRADE

Affected: < 15.1

Fixed in: 15.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy s2 || rpm -q s2 || s2 --version

2. UPGRADE to 15.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade s2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade s2

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2023-27355?

one firmware: mitigate or apply the listed mitigation; s1: upgrade to 11.7.1; s2: upgrade to 15.1. Exact commands for each OS are on this page.

Is CVE-2023-27355 being exploited?

CVE-2023-27355 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-2023-27355 affect?

CVE-2023-27355 affects one firmware, s1, s2. Severity is high (CVSS 8.8). This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Sonos One Speaker 70.3-35220. Authentication is not required to exploit this vulnerability. The specific flaw exists within the MPEG

How urgent is CVE-2023-27355?

Priority 45/100. High severity

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References

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