CVE-2021-34705 is a medium-severity vulnerability affecting Cisco IOS and IOS XE Software's Voice Telephony Service Provider (VTSP) service. It allows an unauthenticated, remote attacker to bypass configured dial patterns on Foreign Exchange Office (FXO) interfaces by sending a malformed dial string via ISDN or SIP. This could lead to toll fraud and unexpected financial costs for affected organizations. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
12.3\(7\)xmCPE matchmatch criteria | cpe:2.3:o:cisco:ios:12.3\(7\)xm:*:*:*:*:*:*:* | ||
12.3\(7\)xrCPE matchmatch criteria | cpe:2.3:o:cisco:ios:12.3\(7\)xr:*:*:*:*:*:*:* | ||
12.3\(7\)xr1CPE matchmatch criteria | cpe:2.3:o:cisco:ios:12.3\(7\)xr1:*:*:*:*:*:*:* | ||
12.3\(7\)xr2CPE matchmatch criteria | cpe:2.3:o:cisco:ios:12.3\(7\)xr2:*:*:*:*:*:*:* | ||
12.3\(7\)xr3CPE matchmatch criteria | cpe:2.3:o:cisco:ios:12.3\(7\)xr3:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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