Sure. If you generate a private key that is a relatively small integer (or very close to the high end of the range, or one that coincides with a sha256 hash of any common phrase or password), then it would be vulnerable.
How do i specifically avoid this? If i generate a private key using secure wallet like hardware wallet or may be software wallet like electrum then how do i make sure it's not vulnerable to this? (a small integer/or coincides with SHA256 hash of common phrase) ? or the probability of this happening is not worth considering?