How severe is CVE-2022-43973?

CVE-2022-43973 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-2022-43973 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-43973?

CVE-2022-43973 affects Linksys Wrt54gl Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-43973?

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-2022-43973 published?

CVE-2022-43973 was published on 2023-01-09 and last updated on 2026-06-17.

CVE-2022-43973

CVE-2022-43973 is a high-severity vulnerability in Linksys Wrt54gl Firmware with a CVSS 3.x base score of 7.2. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Linksys Wrt54gl Firmware
Published: 2023-01-09
Last modified: 2026-06-17

Description

An arbitrary code execution vulnerability exisits in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. The Check_TSSI function within the httpd binary uses unvalidated user input in the construction of a system command. An authenticated attacker with administrator privileges can leverage this vulnerability over the network via a malicious POST request to /apply.cgi to execute arbitrary commands on the underlying Linux operating system as root.

Frequently asked questions

What is CVE-2022-43973?: An arbitrary code execution vulnerability exisits in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. The Check_TSSI function within the httpd binary uses unvalidated user input in the construction of a system command. An authenticated attacker with administrator privileges can leverage this vulnerability over the network via a malicious POST request to /apply.cgi to execute arbitrary commands on the underlying Linux operating system as root.
How severe is CVE-2022-43973?: CVE-2022-43973 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-2022-43973 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-43973?: CVE-2022-43973 affects Linksys Wrt54gl Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-43973?: 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-2022-43973 published?: CVE-2022-43973 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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