VDB-341157 · CVE-2025-67835 · WID-SEC-2026-0123

Paessler PRTG Network Monitor up to 23.2.83.1760 Notification Contacts denial of service

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.1	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Paessler PRTG Network Monitor. It has been classified as problematic. This vulnerability affects unknown code of the component Notification Contacts Handler. Performing a manipulation results in denial of service. This vulnerability is reported as CVE-2025-67835. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Paessler PRTG Network Monitor. This affects an unknown code block of the component Notification Contacts Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

Paessler PRTG Network Monitor before 25.4.114 allows Denial-of-Service (DoS) by an authenticated attacker via the Notification Contacts functionality.

This vulnerability is uniquely identified as CVE-2025-67835 since 12/12/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 25.4.114 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0123). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

Paessler PRTG

Productinfo

Type

Network Management Software

Vendor

Paessler

Name

PRTG Network Monitor

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: PRTG Network Monitor 25.4.114

Timelineinfo

12/12/2025 CVE reserved
01/14/2026 +33 days Advisory disclosed
01/14/2026 +0 days VulDB entry created
01/15/2026 +1 days VulDB entry last update

Sourcesinfo

Status: Confirmed

CVE: CVE-2025-67835 (🔒)
GCVE (CVE): GCVE-0-2025-67835
GCVE (VulDB): GCVE-100-341157
CERT Bund: WID-SEC-2026-0123 - Paessler PRTG: Mehrere Schwachstellen

Entryinfo

Created: 01/14/2026 21:37
Updated: 01/15/2026 15:44
Changes: 01/14/2026 21:37 (55), 01/15/2026 15:44 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.