CVE-2024-20322

mediumpriority · track · 0EPSS 0.005 · 42 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.49% (42nd) EPSS
CVSS 5.8 · medium
Is it mine?
18 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 access control list (ACL) processing on Pseudowire interfaces in the ingress direction of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to improper assignment of lookup keys to internal interface contexts. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to access resources behind the affected device that were supposed to be protected by a configured ACL.

01

remediations

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

A vendor fix is available.

02

cvss

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

5.8
010

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

v3.15.8mediumAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · FSTEC (BDU) RU
v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · ENISA EU
v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · psirt@cisco.com USexploitability 3.9 · impact 1.4
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)
v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:Nsecondary · Cisco PSIRT US
03

ssvc

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

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284USCWE-284US
05

affected products (18)

Products and version ranges known to be affected.

06

advisories (2)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2024-0631Cisco IOS XR: Mehrere SchwachstellenDeutsch2024-03-13csaf · cert_bundDE

    Ein lokaler Angreifer kann mehrere Schwachstellen in Cisco IOS XR ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen, Sicherheitsmaßnahmen zu umgehen oder seine Privilegien zu erweitern.

  • cisco-sa-iosxr-acl-bypass-RZU5NL3eCisco IOS XR Software MPLS and Pseudowire Interfaces Access Control List Bypass Vulnerabilities2024-03-13csaf · cisco_csafUS

    Multiple vulnerabilities in the IP access control list (ACL) processing in the ingress direction on MPLS and Pseudowire (PW) interfaces of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL. For more information about these vulnerabilities, see the Details ["#details"] section of this advisory. Cisco has released software updates that address these vulnerabilities. There are workarounds that address CVE-2024-20315. There are no workarounds that address CVE-2024-20322. This advisory is part of the March 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: March 2024 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75299"].

07

also known as (4)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundcisco_csafnvdNVDCVE.orgMITRE
published 2024-03-13modified 2026-06-17
09

references (5)

External citations — patches, advisories, analysis.

scry

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