CVE-2018-25237 Hirschmann HiSecOS Buffer Overflow via HTTPS Login
Remote attackers can execute arbitrary code or crash Hirschmann HiSecOS firewalls by sending an overly long password when RADIUS authentication is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-25237?
CVE-2018-25237 is a critical memory corruption vulnerability in Belden Hirschmann HiSecOS Classic Firewall (EAGLE, EAGLE One), published on 3 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Hirschmann HiSecOS devices versions prior to 05.3.03 contain a buffer overflow vulnerability in the HTTPS login interface when RADIUS authentication is enabled that allows remote attackers to crash the device or execute arbitrary code by submitting a password longer than 128 characters. Attackers can exploit improper bounds checking in password handling to overflow a fixed-size buffer and achieve denial of service or remote code execution.
Weakness: CWE-120
Which versions are affected by CVE-2018-25237?
How do I fix CVE-2018-25237?
No fix has been published for CVE-2018-25237 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2018-25237 being exploited?
There is no known exploitation of CVE-2018-25237 in the wild and no public exploit code.
Sources
Also known as GHSA-vrr4-2wxx-29jr.