CVE-2025-1051

Unauthenticated code execution via unchecked ALAC length

Published Jun 2, 2025 · Updated Jun 3, 2025

Heap-based buffer overflow in Sonos Era 300 firmware 81.1-58074 allows remote attackers to execute code through crafted ALAC data. The ALAC processing path copies user-supplied data into a heap buffer without first validating its length. An unauthenticated attacker on an adjacent network can execute code as the anacapa user, with no reported internet-routable path.

CVSS severity8.8
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Sonos Era 300 firmware 81.1-58074 allows remote attackers to execute code through crafted ALAC data. The ALAC processing path copies user-supplied data into a heap buffer without first validating its length. An unauthenticated attacker on an adjacent network can execute code as the anacapa user, with no reported internet-routable path.

The record

CVE
CVE-2025-1051
Published
Jun 2, 2025
Updated
Jun 3, 2025
Vendor
Sonos
Product
Era 300
Classifications
CWE-122, CWE-787, T1203
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=81.1-58074

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Sonos · Era 300version=81.1-58074

Published CVSS scores

8.8Zero Day InitiativeCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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