How severe is CVE-2022-43972?

CVE-2022-43972 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-43972 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-43972?

CVE-2022-43972 affects Linksys Wrt54gl Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-43972?

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

When was CVE-2022-43972 published?

CVE-2022-43972 was published on 2023-01-09 and last updated on 2026-06-17.

CVE-2022-43972

CVE-2022-43972 is a medium-severity vulnerability in Linksys Wrt54gl Firmware with a CVSS 3.x base score of 6.5. 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Linksys Wrt54gl Firmware
Published: 2023-01-09
Last modified: 2026-06-17

Description

A null pointer dereference vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A null pointer dereference in the soap_action function within the upnp binary can be triggered by an unauthenticated attacker via a malicious POST request invoking the AddPortMapping action.

Frequently asked questions

What is CVE-2022-43972?: A null pointer dereference vulnerability exists in Linksys WRT54GL Wireless-G Broadband Router with firmware <= 4.30.18.006. A null pointer dereference in the soap_action function within the upnp binary can be triggered by an unauthenticated attacker via a malicious POST request invoking the AddPortMapping action.
How severe is CVE-2022-43972?: CVE-2022-43972 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-43972 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-43972?: CVE-2022-43972 affects Linksys Wrt54gl Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-43972?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-43972 published?: CVE-2022-43972 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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