CVE-2025-8875: N-able N-Central Insecure Deserialization Vulnerability

What it is

Deserialization of Untrusted Data vulnerability in N-able N-central allows Local Execution of Code.This issue affects N-central: before 2025.3.1.

Description quoted from the CVE record (assigned by N-able, published 2025-08-14).

Weakness: CWE-502 Deserialization of Untrusted Data

How it can be exploited

Exploitable over the network with low attack complexity with no special attack requirements needing low privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: no. Technical impact: total.

On CISA KEV since

2025-08-13

US federal deadline

2025-08-20

Ransomware use

Not known

Public exploit evidence (Exploit Observer)

Also known as: CNNVD-202508-1662, EUVD-2025-24823, GHSA-rhqj-c64h-w74r

VEDAS cluster: VEDAS:FLUORITEFIGHTER

Exploit Observer links 5 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (5)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

• Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/nuclei/2025/CVE-2025-8875.yaml
• Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/nuclei/2025/CVE-2025-8875.yaml
• Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/suricata/2025/CVE-2025-8875.rules
• Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/suricata/2025/CVE-2025-8875.rules
• Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/suricata/2025/CVE-2025-8875.rules

Vulnerability databases and vendor advisories (5)

Catalogue entries, not exploit evidence.

• Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2025-24823
• Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-rhqj-c64h-w74r
• Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-8875
• Vulnerability database or vendor advisory: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-8875
• Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202508-1662

5 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS

0.025
some chance of attack soon

VEDAS

0.986
strong exploit evidence

On CISA KEV

Yes, since 2025-08-13

Detection rule

Nuclei · Suricata

Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish.

Who is affected

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

Exploit Observer also maps it to: n-able n-central.

How to fix it

Fixed versions stated in the CVE record: 2025.3.1.

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Vendor guidance:

• https://status.n-able.com/2025/08/13/announcing-the-ga-of-n-central-2025-3-1/
• https://nvd.nist.gov/vuln/detail/CVE-2025-8875

How to detect it

Nuclei template (active check)

Nable - Insecure Deserialization

Deserialization of Untrusted Data vulnerability in N-able N-central allows Local Execution of Code.This issue affects N-central: before 2025.3.1.

Name and description quoted from the template, written by VEDAS.

The template sends 1 request (GET /login); it decides using dsl, regex, status, word matchers. Severity in the template: critical. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

nuclei -u https://your-host -t CVE-2025-8875.yaml

id: CVE-2025-8875

info:
  name: "Nable - Insecure Deserialization"
  author: vedas-arpsyndicate
  severity: critical
  description: |
    Deserialization of Untrusted Data vulnerability in N-able N-central allows Local Execution of Code.This issue
    affects N-central: before 2025.3.1.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2025-8875&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=nable&match=exact
  classification:
    cve-id: CVE-2025-8875
  metadata:
    verified: false
  tags: cve,cve2025,kev,n-able,ncentral,deserialization,rce,nable
http:
  - method: GET
    path:
      - "{{BaseURL}}/login"

    extractors:
      - type: regex
        name: version
        regex:
          - '202\d+\.\d+\.\d+\.\d+\b'
        part: body

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: word
        words:
          - 'class="ncentral"'

      - type: dsl
        dsl:
          - compare_versions(version, '< 2025.3.1.9')

CVE-2025-8875.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2025-8875 Nable - Insecure Deserialization. Add them to your Suricata rule set and reload.

alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2025-8875 Nable - Insecure Deserialization"; flow:established,to_server; http.uri; content:"login"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2025-8875; reference:url,https://www.exploit.observer/?keyword=CVE-2025-8875&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=nable&match=exact; sid:1011801; rev:1;)

CVE-2025-8875.rules on GitHub

References

Government sources

• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-8875 (government-resource)

Other references

• https://status.n-able.com/2025/08/13/announcing-the-ga-of-n-central-2025-3-1/

Other databases

• CVE record (cve.org)
• NVD
• Exploit Observer

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.