Skip to main content

Pardus Software Center EUVDEUVD-2026-26248

| CVE-2026-5166 CRITICAL
Path Traversal (CWE-22)
2026-04-29 TR-CERT
9.6
CVSS 3.1 · Vendor: TR-CERT
View

Attack ChainAIDerived

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

  1. Access
    Host malicious package or repo
  2. Delivery
    Lure user to install via Software Center
  3. Exploit
    Path traversal escapes install directory
  4. Execution
    Write files outside restricted path
  5. Impact
    Compromise host beyond app scope

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK

2 techniques across 2 tactics: Discovery, Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires the victim to actively use Pardus Software Center to fetch and process attacker-controlled content (a malicious package archive or a repository whose entries embed traversal sequences), matching the CVSS UI:R requirement - the user must install or open the crafted content for the traversal to trigger. Limiting factors: mandatory user interaction; the target must be running Pardus Software Center before 1.0.3 (1.0.2 confirmed affected); and the attacker must get their malicious package/repository in front of the user, so environments that restrict installs to signed official repositories substantially blunt the attack. No authentication of the attacker is needed (PR:N), but this is a client-side content-handling flaw rather than a directly reachable network service.

Impact

Signals here are notably in tension and should be weighed rather than driven by the headline 9.6. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H) describes a low-complexity, unauthenticated, network-delivered path traversal with total impact but requiring user interaction. Against that, EPSS is only 0.03% (10th percentile) and CISA SSVC reports Exploitation: none and Automatable: no, though Technical Impact: total agrees with the high CVSS impact metrics. There is no KEV listing and no POC signal in the data, so real-world urgency is far lower than the 9.6 suggests: the impact is severe but exploitation depends on tricking a user into consuming malicious content, is not automatable, and shows no observed activity. This is best treated as a genuine critical-impact bug to patch promptly, but not an emergency 'exploited-in-the-wild' item. Note the AV:N with UI:R combination implies delivery over a network (e.g., a malicious repository or downloaded package) followed by a local user action - verify the exact delivery path with the vendor advisory, as the network vector without server-side exposure is really a client-side content-handling flaw.

Exploit ScenarioDerived

An attacker publishes or serves a crafted package or repository entry containing pathnames with '../' traversal sequences and lures a Pardus user into installing it through the Software Center. When the client processes the content it writes attacker-controlled files outside the intended directory - for example overwriting configuration or startup files - achieving code execution or system compromise. No public exploit is currently available, and success depends on the required user interaction (UI:R).

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 0.0% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Jul 24, 2026

Path traversal (CWE-22) in TUBITAK BILGEM's Pardus Software Center before 1.0.3 lets a remote attacker craft package or repository content whose file paths escape the intended install directory, resulting in high-severity confidentiality, integrity, and availability impact with a scope change (CVSS 9.6). Exploitation requires the victim to interact (UI:R), typically by installing or opening attacker-supplied content, and there is no public exploit identified at time of analysis. EPSS is very low (0.03%, 10th percentile) and CISA SSVC records exploitation as 'none', indicating no observed activity despite the critical score.

RemediationAI

Upgrade Pardus Software Center to version 1.0.3 or later, which the vendor lists as the fixed release (Vendor-released patch: 1.0.3); this is the primary and complete fix. Turkish public-sector operators running Pardus should apply the update through their managed repositories and consult the TR-CERT/USOM advisory at https://www.usom.gov.tr/bildirim/tr-26-0131 and https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0131 for distribution guidance. Until 1.0.3 is deployed, reduce exposure by installing software only from trusted, signed official Pardus repositories and avoiding manually supplied or third-party package/repository sources (the trade-off is reduced flexibility for users who rely on external repos), and restrict which users can add repositories or trigger installs so a traversal payload cannot be delivered through untrusted content.

Affected VersionsENISA

Pardus Software Center 1.0.2 <1.0.3

Affected Packages

euvd pardus_software_center fix: 1.0.3

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

Pardus Software Center is the graphical application/package management front-end for Pardus, a Debian-based Linux distribution maintained by TUBITAK BILGEM (the Turkish national research institute). The flaw is CWE-22, Improper Limitation of a Pathname to a Restricted Directory: the software fails to canonicalize or constrain pathnames it processes (for example package archive member paths, download targets, or repository-supplied filenames), allowing '../' sequences to reference files outside the intended restricted directory. The CPE cpe:2.3:a:tubitak_bilgem_software_technologies_research_institute:pardus_software_center:*:* confirms the affected component is the Software Center application itself rather than the underlying dpkg/APT stack. The CVSS scope change (S:C) indicates the traversal lets the flaw write to or read from resources managed outside the application's own security authority - consistent with a client that unpacks or places files on the wider filesystem.

Know when Pardus Software Center gets its next vulnerability

  • Watch products and get an email when something new is published
  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources

No credit card · 7-day full trial

Severity by source

Vendor (TR-CERT) PRIMARY 9.6 CRITICAL
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
vuln.today AI 9.6 CRITICAL

Content is delivered over the network but a user must install it (UI:R); traversal escapes the app's directory into wider filesystem (S:C) with total impact, and no attacker auth is required (PR:N).

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

Primary rating from Vendor (TR-CERT).

CVSS VectorVendor: TR-CERT

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Patch released
May 04, 2026 - 14:16 nvd
Patch available
Patch available
Apr 29, 2026 - 17:01 EUVD
CVE Published
Apr 29, 2026 - 14:33 nvd
CRITICAL 9.6

DescriptionCVE.org

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in TUBITAK BILGEM Software Technologies Research Institute Pardus Software Center allows Path Traversal.

This issue affects Pardus Software Center: before 1.0.3.

Executive ViewAI

Why It Matters

TUBITAK BILGEM's Pardus Software Center contains a critical path traversal vulnerability (CVE-2026-5166, CVSS 9.6) that could compromise system confidentiality, integrity, and availability if users interact with malicious package or repository content. No public exploit code has been identified at this time, though the vulnerability's critical rating warrants prompt patching. Organizations should prioritize updates to version 1.0.3 or later.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.0%
Top 90% exploitable
Prevalence
Low
regional Linux distro app store, mainly Turkish public-sector deployment
Social Media
1
Sightings
Data Quality
6 sources
Confidence: High

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 CRITICAL
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
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
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

48
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +48
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy