Threats / Paessler / CVE-2018-9276
CVE-2018-9276
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Paessler PRTG Network Monitor vulnerability
Paessler PRTG Network Monitor contains an OS command injection vulnerability in the System Administrator web console that allows authenticated administrators to execute arbitrary commands.
Verdict
Today item — known-exploited.
An authenticated administrator can inject OS commands through the PRTG web interface to achieve arbitrary code execution on the monitoring infrastructure. This vulnerability has been exploited in the wild and carries high exploitability risk.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
2 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-02-04).
Probability (EPSS)
EPSS 0.86943 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Paessler, PRTG Network Monitor. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-78 OS Command Injection — weakness family: Injection.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I gain administrative access to the PRTG System Administrator console through credential compromise or insider access.
Business
Administrative credentials are exposed, indicating potential breach of identity management or insider threat.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I craft malicious input containing OS commands in a vulnerable parameter of the web console.
Business
The monitoring platform becomes a vector for lateral movement within the network infrastructure.
3
Lateral reach — past segmentation narrative 3
Attacker
I execute arbitrary system commands with the privileges of the PRTG service account.
Business
Critical monitoring infrastructure is compromised, potentially disabling visibility into network operations and enabling further attacks.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05