What is the CVSS score of CVE-2016-1581?

CVE-2016-1581 has a CVSS 3.0 base score of 5.5 (Medium). CVSS vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Lxd CVE-2016-1581

MEDIUM

Improper Access Control (CWE-284)

2016-06-09 security@ubuntu.com

Authentication Bypass Canonical Lxd Ubuntu Linux

5.5

CVSS 3.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-284 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Access control enforcement MITRE ATT&CK 1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 5.5 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 0.03%.
Exploit ScenarioDerived	Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAI

LXD before 2.0.2 uses world-readable permissions for /var/lib/lxd/zfs.img when setting up a loop based ZFS pool, which allows local users to copy and read data from arbitrary containers via. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-284. LXD before 2.0.2 uses world-readable permissions for /var/lib/lxd/zfs.img when setting up a loop based ZFS pool, which allows local users to copy and read data from arbitrary containers via unspecified vectors. Affected products include: Canonical Ubuntu Linux, Canonical Lxd. Version information: before 2.0.2.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.5 MEDIUM

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

DescriptionCVE.org

Threat Intelligence Overview

EPSS Score

0.0%

Top 90% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +28

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)CVE.org

cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*

cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*

cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*

More in Lxd

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CVE-2025-54286 HIGH This Week POC

7.5 Oct 02

Cross-site request forgery in the LXD-UI component of Canonical LXD 5.0 before 5.0.5, 5.1 before 5.21.4, and 6.0 before

CVE-2025-54289 HIGH This Week POC

7.4 Oct 02

Privilege escalation in Canonical LXD's operations API (LXD before 6.5 and LXD 5.21 before 5.21.4) allows an authenticat

CVE-2025-54293 HIGH This Week POC

7.1 Oct 02

Authenticated remote attackers with access to the Canonical LXD instance log retrieval or deletion endpoints can read ar

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7.1 Oct 02

Server-side template injection in Canonical LXD's instance snapshot naming feature lets an authenticated user who can mo

CVE-2025-54290 MEDIUM This Month POC

6.9 Oct 02

Unauthenticated project enumeration in Canonical LXD 5.21.x before 5.21.4 and 6.x before 6.5 lets remote attackers deter

CVE-2025-54291 MEDIUM This Month POC

6.9 Oct 02

Unauthenticated remote attackers can confirm the existence of LXD projects on Canonical LXD by comparing HTTP status cod

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9.9 Aug 12

Privilege escalation to host root in Canonical LXD occurs when the container manager unpacks crafted image or backup arc

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9.9 Aug 24

Host root code execution in Canonical LXD arises from a path-traversal flaw in instance template processing, letting an

CVE-2026-112816 CRITICAL Act Now

10.0 Oct 30

Improper certificate validation in the HTTPS API listener of Canonical LXD lets an unauthenticated remote attacker prese

CVE-2026-63293 CRITICAL Act Now

9.9 Aug 12

Arbitrary host file read and write in Canonical LXD occurs because the image import/unpack routine does not verify wheth

CVE-2026-63298 CRITICAL Act Now

9.9 Aug 12

Canonical LXD's NVIDIA GPU passthrough configuration handler fails to sanitize newline characters in user-supplied `nvid

CVE-2026-66898 CRITICAL Act Now

9.9 Aug 12

Path traversal in Canonical's LXD container and VM manager allows a user with backup import/restore privileges to write

Same weakness CWE-284 – Improper Access Control

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References

Advisories & patches

ADVISORY https://linuxcontainers.org/lxd/news/ REF http://www.ubuntu.com/usn/USN-2988-1

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

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