CVE-2024-20398

highpriority · track · 31EPSS 0.002 · 11 %ileDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.21% (11th) EPSS

CVSS 7.8 · high

Is it mine?

168 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to obtain read/write file system access on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of user arguments that are passed to specific CLI commands. An attacker with a low-privileged account could exploit this vulnerability by using crafted commands at the prompt. A successful exploit could allow the attacker to elevate privileges to root.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCisco IOS XR Softwarecisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.18.8highAV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · psirt@cisco.com USexploitability 2 · impact 6

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · NCSC-NL NL

v3.18.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · Cisco PSIRT US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-78USprimaryCWE-78USCWE-78US

affected products (168)

Products and version ranges known to be affected.

Cisco IOS XR <24.1.1all versionscert_bundDE
Cisco IOS XR <24.1.2all versionscert_bundDE
Cisco IOS XR <7.10.2all versionscert_bundDE
Cisco IOS XR <7.11.1all versionscert_bundDE
Cisco IOS XR <7.11.2all versionscert_bundDE
Cisco IOS XR <7.11.21all versionscert_bundDE
Cisco IOS XR< 24.1.1cert_bundDE
Cisco IOS XR< 24.1.2cert_bundDE
Cisco IOS XR< 7.10.2cert_bundDE
Cisco IOS XR< 7.11.1cert_bundDE
Cisco IOS XR< 7.11.2cert_bundDE
Cisco IOS XR< 7.11.21cert_bundDE
Cisco Cisco IOS XR Softwareall versionscisco_csafUS
Cisco Cisco IOS XR Software≤ 6.5.3enisa_euvdEU
Cisco Cisco IOS XR Software≤ 6.6.4enisa_euvdEU
Cisco Cisco IOS XR Software≤ 7.0.90enisa_euvdEU
Cisco Cisco IOS XR Software≤ 7.3.15enisa_euvdEU
Cisco Cisco IOS XR Software≤ 7.2.2enisa_euvdEU
Cisco Cisco IOS XR Software≤ 7.3.5enisa_euvdEU
Cisco Cisco IOS XR Software≤ 7.0.12enisa_euvdEU

showing 20 of 168

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2024-0371Kwetsbaarheden verholpen in Cisco IOS XRNL2024-09-13csaf · ncsc_nlNL
Cisco heeft kwetsbaarheden verholpen in IOS XR.
WID-SEC-W-2024-2125Cisco IOS XR: Mehrere SchwachstellenDeutsch2024-09-11csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Cisco IOS XR ausnutzen, um einen Denial of Service Angriff durchzuführen, erhöhte Rechte zu erlangen und vertrauliche Informationen preiszugeben.
cisco-sa-iosxr-priv-esc-CrG5vhCqCisco IOS XR Software CLI Privilege Escalation Vulnerability2024-09-11csaf · cisco_csafUS
A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to obtain read/write file system access on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of user arguments that are passed to specific CLI commands. An attacker with a low-privileged account could exploit this vulnerability by using crafted commands at the prompt. A successful exploit could allow the attacker to elevate privileges to root. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is part of the September 2024 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2024 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75416"].

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund cisco_csaf ncsc_nl NVD CVE.org MITRE

published 2024-09-11modified 2026-06-17

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references (5)

External citations — patches, advisories, analysis.

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