CVE-2020-5686 Auth bypass in UNIVERGE SV9500/SV8500 series
An attacker can bypass authentication to access remote maintenance features and obtain sensitive information from NEC UNIVERGE PBX systems.
- 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-2020-5686?
CVE-2020-5686 is a high-severity authentication bypass vulnerability in NEC Corporation UNIVERGE SV9500/SV8500 series, published on 13 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Incorrect implementation of authentication algorithm issue in UNIVERGE SV9500 series from V1 to V7and SV8500 series from S6 to S8 allows an attacker to access the remote system maintenance feature and obtain the information by sending a specially crafted request to a specific URL.
Weakness: CWE-287
Which versions are affected by CVE-2020-5686?
It affects 2 products.
Products include Nec Univerge Sv8500 Firmware, Nec Univerge Sv9500 Firmware.
How do I fix CVE-2020-5686?
No fix has been published for CVE-2020-5686 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-5686 being exploited?
There is no known exploitation of CVE-2020-5686 in the wild and no public exploit code.
Other vulnerabilities in NEC Corporation UNIVERGE SV9500/SV8500 series
Sources
Also known as GHSA-gq7j-hx55-h62p.