CVE-2019-13955 Denial of service in n/a
An authenticated remote attacker can crash the HTTP server by sending a crafted HTTP request with recursive JSON, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-13955?
CVE-2019-13955 is a medium-severity denial of service vulnerability in Mikrotik Routeros, published on 26 Jul 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mikrotik RouterOS before 6.44.5 (long-term release tree) is vulnerable to stack exhaustion. By sending a crafted HTTP request, an authenticated remote attacker can crash the HTTP server via recursive parsing of JSON. Malicious code cannot be injected.
Weakness: CWE-674
Which versions are affected by CVE-2019-13955?
It affects 1 product.
Products include Mikrotik Routeros.
How do I fix CVE-2019-13955?
No fix has been published for CVE-2019-13955 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-13955 being exploited?
There is no known exploitation of CVE-2019-13955 in the wild and no public exploit code.
Other vulnerabilities in Mikrotik Routeros
- CVE-2018-7445 MikroTik RouterOS Stack-Based Buffer Overflow
- CVE-2026-86060 MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command
- CVE-2018-14847 MikroTik Router OS Directory Traversal
- CVE-2026-67277 MikroTik RouterOS Missing Authentication for Critical Function
- CVE-2026-67279 Mikrotik RouterOS Improper Enforcement of Behavioral Workflow
Sources
Also known as GHSA-3jpj-5qjm-m8r4.