HIGHCVSS v3.1 8.8Actively exploited · CISA KEV since 2021-11-03Vulnerability

CVE-2020-3118

Cisco IOS XR improperly validates string input from certain fields in Cisco Discovery Protocol messages. Exploitation could allow an unauthenticated, adjacent attacker to execute code with administrative privileges or cause a reload on an affected device.

Properties

Euvd product
Cisco IOS XR Software
Vulnerability name
Cisco IOS XR Software Discovery Protocol Format String Vulnerability
First seen
2025-10-21T23:35:52+00:00
Cvss score
8.8
Epss score
0.11685
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
8.8
Euvd base score version
3.0
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Cisco
Cvss vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
8.8

Related Entities (46 · showing 24)

AFFECTS_PRODUCT (42 · showing 20)

→[Product]cpe:2.3:h:cisco:ncs_540x-12z16g-sys-a:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ncs_540x-12z16g-sys-d:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ncs_540l:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ncs_6008:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ncs_5502:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:crs-x:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ios_xr:5.2.5:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:asr_9920:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ncs_5501:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ios_xr:7.0.1:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ncs_5501-se:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ncs_5502-se:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:asr_9000:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:asr_9903:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ncs_5516:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:xrv_9000:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ncs_540x-16z4g8q2c-d:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:cisco:ios_xr:6.4.2:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ncs_540x-acc-sys:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:h:cisco:ncs_560:-:*:*:*:*:*:*:*

HAS_WEAKNESS (2)

→[Weakness]Use of Externally-Controlled Format String
→[Weakness]Out-of-bounds Write

DESCRIBES (1)

←[KEVEntry]Cisco IOS XR Software Discovery Protocol Format String Vulnerability

INVOLVES (1)

←[Signal]kev_added · 2021-11-03

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CVE-2020-3118 (CVSS v3.1 8.8) — Ninja Signal Threat Intelligence | Ninja Signal