Squid 2.5.STABLE9 and earlier does not trigger a fatal error when it identifies missing or invalid ACLs in the http_access configuration, which could lead to less restrictive ACLs than intended by the administrator.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This vulnerability has a 1.71% probability of being exploited in the next 30 days, ranking higher than 77% of all scored CVEs.