2N Access Commander: Improper Output Neutralization for Logs
CVE-2025-59784 is a high-severity improper output neutralization for logs vulnerability in 2N Access Commander from 2N Telekomunikace a.s., with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. The record lists version 3.4.2 as the first without the flaw, so updating 2N Access Commander to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.33% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update 2N Access Commander to 3.4.2 or a later version.
- Update Access Commander to 3.4.2 or a later version.
- Read the advisory on 2n.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| 2N Telekomunikace a.s. | 2N Access Commander | before 3.4.2 | 3.4.2 |
| 2n | Access Commander | before 3.4.2 | 3.4.2 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 6.9 | Medium | CNA |
| CVSS 3.1 | 7.2 | High | NVD |
Official description
2N Access Commander version 3.4.1 and prior is vulnerable to log pollution. Certain parameters sent over API may be included in the logs without prior validation or sanitisation. This vulnerability can only be exploited after authenticating with administrator privileges.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Output Neutralization for Logs
The product constructs a log message from external input, but it does not neutralize or incorrectly neutralizes special elements when the message is written to a log file.
How developers prevent this class of flaw
- Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.
More Improper Output Neutralization for Logs vulnerabilities (CWE-117)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in 2N Access Commander
- 9.8 Critical severity
- 7.2 High severity
- 7.2 High severity
Recent Improper Output Neutralization for Logs vulnerabilities
- 7.5 High severity
- 9.8 Critical severity
- 8.1 High severity
- 7.2 High severity
- 8.6 High severity
- 9.8 Critical severity
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