CRITICALCVSS v3.1 9.8Actively exploited · CISA KEV since 2021-11-03Vulnerability

CVE-2020-3161

Cisco IP Phones contain an improper input validation vulnerability for HTTP requests. Exploitation could allow an attacker to execute code remotely with root privileges or cause a denial-of-service (DoS) condition.

Properties

Euvd product
Cisco IP phone
Vulnerability name
Cisco IP Phones Web Server Remote Code Execution and Denial-of-Service Vulnerability
First seen
2025-10-21T23:35:45+00:00
Cvss score
9.8
Epss score
0.83855
Last seen
2026-10-19T12:00:27+00:00
Due date
2022-05-03
Euvd assigner
cisco
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2021-11-03T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2021-11-03
Score
9.8
Euvd base score version
3.0
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Cisco
Cvss vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
9.8

Related Entities (47 · showing 23)

AFFECTS_PRODUCT (44 · showing 20)

→[Product]cpe:2.3:o:cisco:ip_phone_8865_firmware:11.0\(5\)sr1:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_8851_firmware:11.0\(5\)sr1:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_8851_firmware:11.0\(1\):*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ip_phone_8865:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ip_phone_8851:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_7841_firmware:11.0\(1\):*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_8865_firmware:11.0\(1\):*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_8851_firmware:10.3\(1\)es14:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_8865_firmware:10.3\(1\)es14:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ip_phone_7841:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:8831_firmware:10.3\(1\)es14:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_8811_firmware:11.0\(5\)sr1:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_7821_firmware:11.0\(1\):*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ip_phone_7861:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ip_phone_8821:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_8821-ex_firmware:10.3\(1\)es14:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_8841_firmware:10.3\(1\)es14:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ip_phone_8821-ex:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_8845_firmware:10.3\(1\)es14:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ip_phone_8861_firmware:11.0\(1\):*:*:*:*:*:*:*

DESCRIBES (1)

←[KEVEntry]Cisco IP Phones Web Server Remote Code Execution and Denial-of-Service Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Improper Input Validation

INVOLVES (1)

←[Signal]kev_added · 2021-11-03

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CVE-2020-3161 (CVSS v3.1 9.8) — Ninja Signal Threat Intelligence | Ninja Signal