HIGH CVSS 7.5
Published: 2026-01-10

CVE-2025-52435

apache nimble Security Advisory (CVE-2025-52435)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2025-52435 impacting apache nimble. Evaluated with CVSS Base Score of 7.5 (HIGH).

Original NVD Description

Source: NIST NVD
J2EE Misconfiguration: Data Transmission Without Encryption vulnerability in Apache NimBLE. Improper handling of Pause Encryption procedure on Link Layer results in a previously encrypted connection being left in un-encrypted state allowing an eavesdropper to observe the remainder of the exchange. This issue affects Apache NimBLE: through <= 1.8.0. Users are recommended to upgrade to version 1.9.0, which fixes the issue.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
None (PR:N)
Unauthenticated execution
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
High (C:H)
Total information disclosure
Integrity
None (I:N)
No system modification impact
Availability
None (A:N)
No system availability impact

🎯 Affected Versions Matrix

Affected Product apache / nimble
Affected Versions *
Weakness Enumeration CWE-5

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2025-52435 impacting apache nimble.

⚡ Nuclei Detection Template (YAML) cve-2025-52435.yaml
id: cve-2025-52435

info:
  name: apache nimble - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2025-52435 affecting apache nimble.
    Evaluation: J2EE Misconfiguration: Data Transmission Without Encryption vulnerability in Apache NimBLE.

Improper handling of Pause Encryption procedure on Link L...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2025-52435
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2025-52435
    cwe-id: CWE-5
  tags: cve,cve-2025-52435,apache,nimble,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "nimble"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2025-52435.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2025-52435
# Target: apache nimble | CVSS: 7.5 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2025-52435 (apache nimble)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against apache nimble scope (*).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2025-52435.sh
# Recommended Remediation & Patching Commands for CVE-2025-52435
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install nimble 2>/dev/null || \
sudo dnf upgrade nimble 2>/dev/null || \
sudo yum update nimble

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i nimble 2>/dev/null || rpm -qa | grep -i nimble

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2025-52435 in apache nimble?

Review vendor-specific security notices and update apache nimble packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2025-52435?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2025-52435?

CVE-2025-52435 is classified with a CVSS 3.1 Base Score of 7.5 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
7.5
HIGH SEVERITY
CVE ID CVE-2025-52435
Weakness CWE-5
Vendor apache
Product nimble
Published 2026-01-10
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N