The vulnerability applies to more than just 2960 and 3900 routers
The RAT may only affect the routers in the article, but many more systems are vulnerable to the exploit that maybe led to the RAT:
Affected Model Fixed Firmware Version
Vigor3910 4.3.1.1
Vigor3220 Series 3.9.7.2
Vigor2962 Series 4.3.1.1
Vigor2952 / 2952P 3.9.7.2
Vigor2927 Series 4.4.0
Vigor2927 LTE Series 4.4.0
Vigor2926 Series 3.9.8.1
Vigor2926 LTE Series 3.9.8.1
Vigor2925 Series 3.9.2
Vigor2925 LTE Series 3.9.2
Vigor2915 Series 4.3.3.2
Vigor2912 3.8.15
Vigor2866 Series 4.4.0
Vigor2866 LTE Series 4.4.0
Vigor2865 Series 4.4.0
Vigor2865 LTE Series 4.4.0
Vigor2862 Series 3.9.8.1
Vigor2862 LTE Series 3.9.8.1
Vigor2860 Series 3.9.2
Vigor2860 LTE Series 3.9.2
Vigor2832 3.9.6.1
Vigor2766 Series 4.4.2
Vigor2765 Series 4.4.2
Vigor2762 Series 3.9.6.4
Vigor2760 Series 3.8.9.6
Vigor2620 LTE Series 3.9.8.1
VigorLTE 200n 3.9.8.1
Vigor2135 Series 4.4.2
Vigor2133 Series 3.9.6.4
Vigor1000B 4.3.1.1
Vigor166 4.2.4
Vigor165 4.2.4
Firmware update are free, so get patching if you haven't already.