How severe is CVE-2024-20343?

CVE-2024-20343 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2024-20343 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-20343?

CVE-2024-20343 primarily affects Cisco Ios Xr. In total, 66 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-20343?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-20343 have an EU (EUVD) identifier?

Yes. CVE-2024-20343 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18058.

When was CVE-2024-20343 published?

CVE-2024-20343 was published on 2024-09-11 and last updated on 2026-06-17.

CVE-2024-20343

CVE-2024-20343 is a medium-severity vulnerability in Cisco Ios Xr with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-18058
Weakness: CWE-284
Affected product: Cisco Ios Xr
Published: 2024-09-11
Last modified: 2026-06-17

Description

A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to read any file in the file system of the underlying Linux operating system. The attacker must have valid credentials on the affected device. This vulnerability is due to incorrect validation of the arguments that are passed to a specific CLI command. An attacker could exploit this vulnerability by logging in to an affected device with low-privileged credentials and using the affected command. A successful exploit could allow the attacker access files in read-only mode on the Linux file system.

Frequently asked questions

What is CVE-2024-20343?: A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to read any file in the file system of the underlying Linux operating system. The attacker must have valid credentials on the affected device. This vulnerability is due to incorrect validation of the arguments that are passed to a specific CLI command. An attacker could exploit this vulnerability by logging in to an affected device with low-privileged credentials and using the affected command. A successful exploit could allow the attacker access files in read-only mode on the Linux file system.
How severe is CVE-2024-20343?: CVE-2024-20343 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2024-20343 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-20343?: CVE-2024-20343 primarily affects Cisco Ios Xr. In total, 66 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-20343?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-20343 have an EU (EUVD) identifier?: Yes. CVE-2024-20343 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18058.
When was CVE-2024-20343 published?: CVE-2024-20343 was published on 2024-09-11 and last updated on 2026-06-17.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-shellutil-HCb278wD

Affected products (66)

cpe:2.3:o:cisco:ios_xr:6.5.1:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.5.2:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.5.3:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.5.15:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.5.92:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.5.93:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.6.1:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.6.2:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.6.3:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.6.4:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.6.11:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.6.12:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:6.6.25:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.0.0:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.0.1:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.0.2:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.0.11:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.0.12:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.0.14:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.0.90:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.1.1:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.1.2:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.1.3:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.1.15:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.1.25:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.2.0:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.2.1:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.2.2:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.2.12:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.3.1:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.3.2:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.3.3:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.3.4:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.3.5:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.3.6:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.3.15:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.3.16:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.3.27:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.4.1:*:*:*:*:*:x64:*
cpe:2.3:o:cisco:ios_xr:7.4.2:*:*:*:*:*:x64:*

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