The issue doesn't crop up in PIX 7.0 or in Cisco's newer Adaptive Security Appliance, but that isn't going to reassure many security experts. Ars Technica warns that there appear to be over 15,000 networks still clinging on to PIX, and there's a real possibility that many of them are vulnerable. Other platforms have comparable security holes, too, suggesting that the NSA might have snooped on many VPNs. To make matters worse, the Equation Group breach lets any would-be hacker use the exploit. While the past surveillance is alarming, you may need to worry more about everyday criminals going forward.