CVE-2018-11518 describes a phreaking vulnerability in HCL legacy IVR systems that do not use VoIP, allowing attackers to record and replay audio frequencies to trigger service activations. This request-forgery issue arises when the IVR system's expected DTMF signals for activation are predictable, lacking a nonce for verification. With a CVSS score of 8.1 (HIGH), the vulnerability has a network attack vector, high impact on confidentiality, integrity, and availability, but requires high attack complexity. There is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or KEV entry, though it has received some community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:hcltech:legacy_ivr_firmware:-:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.