What products are affected by CVE-2025-8876?

CVE-2025-8876 affects N-able N-Central. Refer to the vendor advisory and NVD record for affected versions.

Is there a public exploit for CVE-2025-8876?

Yes. Public exploit code or proof-of-concept has been identified for CVE-2025-8876. This lowers the barrier for exploitation and increases the urgency of patching. Organizations should prioritize remediation immediately.

What is the EPSS score for CVE-2025-8876?

CVE-2025-8876 has an EPSS score of 9.2%, placing it in the 93th percentile. This means it has a 9.2% probability of being exploited in the next 30 days, higher than 93% of all known vulnerabilities. EPSS (Exploit Prediction Scoring System) is maintained by FIRST and uses real-world threat data to estimate exploitation likelihood.

Actively Exploited — CISA KEV

CVE-2025-8876: N-able N-Central High-Severity Vulnerability

Severity: High | CVSS 3.1: 8.8 | Published: 2025-08-14 | KEV Added: 2025-08-13

What is CVE-2025-8876?

Improper Input Validation vulnerability in N-able N-central allows OS Command Injection.This issue affects N-central: before 2025.3.1.

Technical Analysis

Weakness Classification

This vulnerability is classified as CWE-20 — Improper Input Validation. The software does not properly validate input, allowing attackers to craft inputs that cause unexpected behavior, data corruption, or code execution.

Attack Vector Breakdown

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

Impact Analysis

This vulnerability is exploitable over the network, meaning any system reachable via the internet or internal network is potentially at risk without physical access. The attack complexity is low, meaning exploitation does not depend on specialized conditions or race windows. Successful exploitation can result in full confidentiality breach (complete data disclosure), complete integrity compromise (data modification or code execution), total availability loss (denial of service). The software does not properly validate input, allowing attackers to craft inputs that cause unexpected behavior, data corruption, or code execution.

Exploitation Probability (EPSS): 9.2% chance of exploitation in the next 30 days (93th percentile). While the base probability may appear low, inclusion in CISA KEV confirms real-world exploitation is already occurring.

Exploit Availability

Public exploit code or proof-of-concept is available for CVE-2025-8876. This significantly increases the risk of exploitation, as attackers can use or adapt existing exploit code rather than developing their own. A public exploit reference has been identified. Organizations should treat this as an urgent patching priority.

Is CVE-2025-8876 being exploited?

Yes. CVE-2025-8876 is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, restricted to CVEs with confirmed active exploitation in the wild. CISA added this vulnerability on 2025-08-13. Inclusion in KEV triggers the patching mandate under BOD 22-01 for U.S. federal civilian agencies, with a remediation deadline of 2025-08-20. Additionally, public exploit code is available, which lowers the barrier for attackers.

How to fix CVE-2025-8876

Apply the security update issued by N-able for N-Central. If an immediate patch is not possible, consult the vendor advisory for mitigation guidance, restrict network exposure of the affected service, and monitor logs for indicators of exploitation. CISA's Known Exploited Vulnerabilities catalog requires U.S. federal agencies to remediate this vulnerability by the due date shown below under Binding Operational Directive 22-01. Private organizations should treat KEV entries as priority-one patches because active exploitation has been confirmed in the wild.

Related Vulnerabilities

Other actively exploited vulnerabilities affecting N-Central or sharing the same weakness (CWE-20):

CVE-2025-8875 (High 7.8) [same product] — Deserialization of Untrusted Data vulnerability in N-able N-central allows…
CVE-2026-34197 (High 8.8) [same CWE] — Improper Input Validation, Improper Control of Generation of Code ('Code…
CVE-2026-32201 (Medium 6.5) [same CWE] — Improper input validation in Microsoft Office SharePoint allows an…
CVE-2025-20393 (Critical 10.0) [same CWE] — A vulnerability in the Spam Quarantine feature of Cisco AsyncOS Software for…
CVE-2025-32706 (High 7.8) [same CWE] — Improper input validation in Windows Common Log File System Driver allows an…

Frequently asked questions

Is CVE-2025-8876 critical?

CVE-2025-8876 has a CVSS 3.1 base score of 8.8 — High severity. It should be treated as a priority patch, especially given the active exploitation confirmed by CISA. The availability of public exploit code further increases the urgency.

Is CVE-2025-8876 being actively exploited?

Yes — CISA added CVE-2025-8876 to the Known Exploited Vulnerabilities catalog on 2025-08-13. Inclusion in KEV means CISA has confirmed in-the-wild exploitation. Public exploit code has also been identified, making exploitation accessible to a broader range of threat actors.

How do I patch CVE-2025-8876?

Apply the security update from N-able for N-Central. Federal agencies must remediate by 2025-08-20 under BOD 22-01.

What type of vulnerability is CVE-2025-8876?

CVE-2025-8876 is classified under CWE-20 (Improper Input Validation). The software does not properly validate input, allowing attackers to craft inputs that cause unexpected behavior, data corruption, or code execution.

What is the CVSS score for CVE-2025-8876?

CVE-2025-8876 has a CVSS 3.1 base score of 8.8, classifying it as High severity. The attack vector is Network, attack complexity is Low, and non-zero privileges are required.