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Fencer Intel
critical 9.8

CVE-2020-3161 kev in the critical feed json

Cisco IP Phones Web Server Remote Code Execution and Denial of Service Vulnerability

published 6y ago modified 4mo ago also EUVD-2020-24432

cvss
9.8
version 3.0, CNA
cisa kev
Exploited
added 2021-11-03
epss
83.9%
EPSS 83.9% chance of exploitation in 30 days, percentile 99.6%
public exploits
1
Exploit-DB

Summary

A vulnerability in the web server for Cisco IP Phones could allow an unauthenticated, remote attacker to execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. The vulnerability is due to a lack of proper input validation of HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web server of a targeted device. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a DoS condition.

Patch / fix

cisa required action Apply updates per vendor instructions.

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Timeline

  1. Published
  2. First public exploit (EDB-48342)
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
5y ago
Patch by
2022-05-03 (4y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Cisco, Cisco IP Phones
CISA name
Cisco IP Phones Web Server Remote Code Execution and Denial-of-Service Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
2y ago

Exploit prediction

83.86% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-48342 Cisco IP Phone 11.7 - Denial of service (PoC) dos, 2020-04-17
  • packetstormsecurity.com http://packetstormsecurity.com/files/157265/Cisco-IP-Phone-11.7-Denial-Of-Service.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • Cisco Cisco IP phone

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.