How severe is CVE-2020-26561?

CVE-2020-26561 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-26561 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26561?

CVE-2020-26561 affects Belkin Linksys Wrt 160nl Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26561?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-26561 published?

CVE-2020-26561 was published on 2020-10-23 and last updated on 2026-06-17.

CVE-2020-26561

CVE-2020-26561 is a high-severity vulnerability in Belkin Linksys Wrt 160nl Firmware with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Belkin Linksys Wrt 160nl Firmware
Published: 2020-10-23
Last modified: 2026-06-17

Description

Belkin LINKSYS WRT160NL 1.0.04.002_US_20130619 devices have a stack-based buffer overflow vulnerability because of sprintf in create_dir in mini_httpd. Successful exploitation leads to arbitrary code execution. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Frequently asked questions

What is CVE-2020-26561?: Belkin LINKSYS WRT160NL 1.0.04.002_US_20130619 devices have a stack-based buffer overflow vulnerability because of sprintf in create_dir in mini_httpd. Successful exploitation leads to arbitrary code execution. NOTE: This vulnerability only affects products that are no longer supported by the maintainer
How severe is CVE-2020-26561?: CVE-2020-26561 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-26561 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26561?: CVE-2020-26561 affects Belkin Linksys Wrt 160nl Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26561?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-26561 published?: CVE-2020-26561 was published on 2020-10-23 and last updated on 2026-06-17.

References

https://research.nccgroup.com/2020/10/20/wrt160nl-cve-2020-26561-bof/

Affected products (1)

cpe:2.3:o:belkin:linksys_wrt_160nl_firmware:1.0.04:build_2:*:*:*:*:*:*

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