HIGHCVSS v3.1 7.2Actively exploited · CISA KEV since 2023-10-23Vulnerability

CVE-2023-20273

Cisco IOS XE contains a command injection vulnerability in the web user interface. When chained with CVE-2023-20198, the attacker can leverage the new local user to elevate privilege to root and write the implant to the file system. Cisco identified CVE-2023-20273 as the vulnerability exploited to deploy the implant. CVE-2021-1435, previously associated with the exploitation events, is no longer believed to be related to this activity.

Properties

Euvd product
Cisco IOS XE Software
Vulnerability name
Cisco IOS XE Web UI Command Injection Vulnerability
First seen
2025-10-21T23:05:33+00:00
Cvss score
7.2
Epss score
0.92992
Last seen
2026-10-19T12:00:27+00:00
Due date
2023-10-27
Euvd assigner
cisco
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2023-10-23T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2023-10-23
Score
7.2
Euvd base score version
3.1
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Cisco
Cvss vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
7.2

Related Entities (312 · showing 23)

AFFECTS_PRODUCT (309 · showing 20)

→[Product]cpe:2.3:o:cisco:ios_xe:16.7.3:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48f-e:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48p-s:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48u-e:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48xs-f-e:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48p-e:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48xs-f-s:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48xs-s:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-32xs-s:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-24xu-e:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48u-l:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48t-s:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48f-s:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48u:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-24xu:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-nm-8-10g:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48pw-s:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-32xs-e:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-nm-2-40g:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:catalyst_3850-48xs:-:*:*:*:*:*:*:*

DESCRIBES (1)

←[KEVEntry]Cisco IOS XE Web UI Command Injection Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

INVOLVES (1)

←[Signal]kev_added · 2023-10-23

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CVE-2023-20273 (CVSS v3.1 7.2) — Ninja Signal Threat Intelligence | Ninja Signal