How severe is CVE-2020-3237?

CVE-2020-3237 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2020-3237 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3237?

CVE-2020-3237 affects Cisco Iox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-3237?

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

When was CVE-2020-3237 published?

CVE-2020-3237 was published on 2020-06-03 and last updated on 2026-06-17.

CVE-2020-3237

CVE-2020-3237 is a medium-severity vulnerability in Cisco Iox with a CVSS 3.x base score of 6.3. 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-59.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 4.6
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-59
Affected product: Cisco Iox
Published: 2020-06-03
Last modified: 2026-06-17

Description

A vulnerability in the Cisco Application Framework component of the Cisco IOx application environment could allow an authenticated, local attacker to overwrite arbitrary files in the virtual instance that is running on the affected device. The vulnerability is due to insufficient path restriction enforcement. An attacker could exploit this vulnerability by including a crafted file in an application package. An exploit could allow the attacker to overwrite files.

Frequently asked questions

What is CVE-2020-3237?: A vulnerability in the Cisco Application Framework component of the Cisco IOx application environment could allow an authenticated, local attacker to overwrite arbitrary files in the virtual instance that is running on the affected device. The vulnerability is due to insufficient path restriction enforcement. An attacker could exploit this vulnerability by including a crafted file in an application package. An exploit could allow the attacker to overwrite files.
How severe is CVE-2020-3237?: CVE-2020-3237 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2020-3237 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3237?: CVE-2020-3237 affects Cisco Iox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-3237?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-3237 published?: CVE-2020-3237 was published on 2020-06-03 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-caf-file-mVnPqKW9

Affected products (1)

cpe:2.3:a:cisco:iox:*:*:*:*:*:*:*:*

More vulnerabilities in Cisco Iox

CVE-2017-3853 — Critical (CVSS 9.8): A vulnerability in the Data-in-Motion (DMo) process installed with the Cisco IOx application environment could allow an…
CVE-2020-3238 — High (CVSS 8.1): A vulnerability in the Cisco Application Framework component of the Cisco IOx application environment could allow an…
CVE-2017-3852 — High (CVSS 8.1): A vulnerability in the Cisco application-hosting framework (CAF) component of the Cisco IOx application environment…
CVE-2017-3851 — High (CVSS 7.5): A Directory Traversal vulnerability in the web framework code of the Cisco application-hosting framework (CAF)…
CVE-2023-20076 — High (CVSS 7.2): A vulnerability in the Cisco IOx application hosting environment could allow an authenticated, remote attacker to…
CVE-2016-9199 — Medium (CVSS 6.5): A vulnerability in the Cisco application-hosting framework (CAF) of Cisco IOx could allow an authenticated, remote…

All CVEs affecting Cisco Iox →

Other CWE-59 (Improper Link Resolution Before File Access (Link Following)) vulnerabilities

CVE-2024-37143 — Critical (CVSS 10.0): Dell PowerFlex appliance versions prior to IC 46.381.00 and IC 46.376.00, Dell PowerFlex rack versions prior to RCM…
CVE-2024-28189 — Critical (CVSS 10.0): Judge0 is an open-source online code execution system. The application uses the UNIX chown command on an untrusted file…
CVE-2024-28185 — Critical (CVSS 10.0): Judge0 is an open-source online code execution system. The application does not account for symlinks placed inside the…
CVE-2022-22995 — Critical (CVSS 10.0): The combination of primitives offered by SMB and AFP in their default configuration allows the arbitrary writing of…
CVE-2014-4480 — Critical (CVSS 10.0): Directory traversal vulnerability in afc in AppleFileConduit in Apple iOS before 8.1.3 and Apple TV before 7.0.3 allows…
CVE-2002-2374 — Critical (CVSS 10.0): Unspecified vulnerability in pprosetup in Sun PatchPro 2.0 has unknown impact and attack vectors related to "unsafe use…

Browse all CWE-59 (Improper Link Resolution Before File Access (Link Following)) vulnerabilities →