How severe is CVE-2022-43970?

CVE-2022-43970 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-43970 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 19% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-43970?

CVE-2022-43970 affects Linksys Wrt54gl Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-43970?

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-2022-43970 published?

CVE-2022-43970 was published on 2023-01-09 and last updated on 2026-06-17.

CVE-2022-43970

CVE-2022-43970 is a high-severity vulnerability in Linksys Wrt54gl Firmware with a CVSS 3.x base score of 7.2. Its EPSS exploit-prediction score of 19% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 19% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Linksys Wrt54gl Firmware
Published: 2023-01-09
Last modified: 2026-06-17

Description

A buffer overflow vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A stack-based buffer overflow in the Start_EPI function within the httpd binary allows an authenticated attacker with administrator privileges to execute arbitrary commands on the underlying Linux operating system as root. This vulnerablity can be triggered over the network via a malicious POST request to /apply.cgi.

Frequently asked questions

What is CVE-2022-43970?: A buffer overflow vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A stack-based buffer overflow in the Start_EPI function within the httpd binary allows an authenticated attacker with administrator privileges to execute arbitrary commands on the underlying Linux operating system as root. This vulnerablity can be triggered over the network via a malicious POST request to /apply.cgi.
How severe is CVE-2022-43970?: CVE-2022-43970 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-43970 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 19% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-43970?: CVE-2022-43970 affects Linksys Wrt54gl Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-43970?: 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-2022-43970 published?: CVE-2022-43970 was published on 2023-01-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:linksys:wrt54gl_firmware:*:*:*:*:*:*:*:*

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