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Veeam Agent EUVDEUVD-2026-111125

| CVE-2026-105477 HIGH
Untrusted Search Path (CWE-426)
2026-10-27 hackerone GHSA-hmhw-3722-4w82
7.3
CVSS 4.0 · Vendor: hackerone
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain local low-privileged access to managed host
  2. Exploit
    Plant malicious binary/library in untrusted search path
  3. Execution
    Veeam agent loads attacker-controlled file as root
  4. Impact
    Gain full root-level host compromise

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A08:2025 - Software or Data Integrity Failures
ASVS 5.0
V13 - Configuration Search path verification
Exploitation Conditions

Exploitation requires local, low-privileged access (AV:L, PR:L) to a host running Veeam Agent for Linux, AND the installation must be managed by a Veeam Backup & Replication instance - the description explicitly states that only such managed installations are affected, so standalone/unmanaged Agent for Linux deployments are not exploitable. The flaw is an untrusted search path (CWE-426), and the CVSS 4.0 AT:P metric reflects that success depends on this managed-deployment condition outside the attacker's control. Limiting factors: there is no remote vector (local access mandatory), a pre-existing low-privilege foothold is needed, and only the managed deployment mode and affected versions (13.1 before 13.1.2) are vulnerable. The sources do not describe exactly how the search path is triggered.

Impact

This is a genuine but moderate-priority issue rather than an emergency. The sole supplied CVSS 4.0 vector (AV:L/AC:L/AT:P/PR:L/UI:N, score 7.3) describes a LOCAL privilege-escalation flaw (CWE-426, untrusted search path): the attacker must already have local, low-privileged access (PR:L) to a Linux host running Veeam Agent for Linux, and exploitation depends on a condition beyond the attacker's control (AT:P) - namely that the install is managed by a Veeam Backup & Replication instance. There is no remote vector, so mass or internet-facing exploitation is not in scope. No EPSS score, no CISA KEV listing, and no PoC or exploit reference are present in the data, so this is 'no public exploit identified at time of analysis'; exploitation probability cannot be quantified from the inputs. The vuln.today Decision label is 'this_week' (not act_now/emergency), which aligns with a high-impact (VC:H/VI:H/VA:H → full host compromise once triggered) but access-gated local flaw. A vendor patch is available, so the realistic posture is: schedule the update promptly for affected managed Linux agents, but this is not a drop-everything remote RCE. Note the AT:P metric is driven by the 'managed by Veeam Backup & Replication' precondition rather than any timing/race mechanism - the sources do not describe the trigger mechanism.

Exploit ScenarioDerived

An attacker (or malicious process) with an existing low-privileged local account on a Linux server where Veeam Agent for Linux is deployed and managed by a Veeam Backup & Replication server abuses an untrusted search path (CWE-426) to have the agent load an attacker-controlled binary or library, executing it with the agent's elevated (root) privileges. Because the CVSS vector is local (AV:L) and requires low privileges (PR:L), a foothold on the host is a prerequisite; no public exploit code is identified in the available data.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 28, 2026

Local privilege escalation in Veeam Agent for Linux 13.1 allows a local low-privileged user to gain elevated privileges on hosts whose agent installation is managed by a Veeam Backup & Replication instance; standalone/unmanaged deployments are not affected. The flaw is an untrusted search path (CWE-426), the vendor has released a fix in 13.1.2, and no public exploit identified at time of analysis. This is a genuine but moderate-priority issue rather than an emergency.

RemediationAI

Vendor-released patch: upgrade Veeam Agent for Linux to 13.1.2 or later; the fix is documented in Veeam KB4948 at https://www.veeam.com/kb4948. Because only managed installations are affected, confirm whether the agent is managed by a Veeam Backup & Replication instance and prioritize those hosts; standalone/unmanaged installations are not in scope for this flaw. The available sources do not describe an additional vendor workaround beyond updating.

Affected VersionsENISA

Agent for Linux 13.1 <13.1.2

Affected Packages

euvd agent_for_linux fix: 13.1.2

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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

Technical ContextAI · show details

Veeam Agent for Linux is a backup agent, and the affected product is identified by CPE cpe:2.3:a:veeam:agent_for_linux:*:*:*:*:*:*:*:* with EUVD listing Agent for Linux 13.1 before 13.1.2 as vulnerable. The root cause class is CWE-426 Untrusted Search Path: the agent resolves a resource through a search path that can be influenced by a local user, although the available sources do not describe exactly how the search path is triggered. The supplied CVSS 4.0 vector is AV:L/AC:L/AT:P/PR:L/UI:N with high confidentiality, integrity, and availability impact; the independent assessment maps this to CVSS 3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. Exploitation requires local low-privileged access to a host running the agent, and the installation must be managed by a Veeam Backup & Replication instance, so standalone/unmanaged deployments are not exploitable. The CVSS 4.0 AT:P metric reflects that managed-deployment condition outside the attacker's control.

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Severity by source

Vendor (hackerone) PRIMARY 7.3 HIGH
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
vuln.today AI 7.0 HIGH

Local-only untrusted-search-path escalation needing a low-priv foothold (PR:L) plus the managed-by-VBR precondition (modeled as AC:H); loading code as root yields full C/I/A impact.

3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (hackerone).

CVSS VectorVendor: hackerone

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
High
Vulnerable system: Integrity
High
Vulnerable system: Availability
High
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

2
Patch available
Oct 27, 2026 - 17:18 EUVD
CVE Published
Oct 27, 2026 - 16:16 cve.org
HIGH 7.3

DescriptionCVE.org

A vulnerability in Veeam Agent for Linux allows for local privilege escalation. Only installations that are managed by a Veeam Backup & Replication instance are affected.

Executive ViewAI

Why It Matters

A high-severity privilege escalation vulnerability in Veeam Agent for Linux 13.1 affects only managed deployments, where a local low-privileged user could gain elevated access on the host. Leadership should prioritize patching managed Linux agents because exploitation could allow an attacker to compromise backup infrastructure and sensitive data.

Business Impact: Medium
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.1%
Top 97% exploitable
Prevalence
Medium
Veeam backup is common in enterprises, but Linux agent managed by VBR is a narrower footprint
Data Quality
4 sources
Confidence: Medium

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 HIGH
CISA KEV No
Public POC No
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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
No
Human Impact
Medium

Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +36
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

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