How severe is CVE-2020-15490?

CVE-2020-15490 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-15490 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15490?

CVE-2020-15490 affects Wavlink Wl-wn530hg4 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15490?

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

When was CVE-2020-15490 published?

CVE-2020-15490 was published on 2020-07-01 and last updated on 2026-06-17.

CVE-2020-15490

CVE-2020-15490 is a critical-severity vulnerability in Wavlink Wl-wn530hg4 Firmware with a CVSS 3.x base score of 9.8. 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Wavlink Wl-wn530hg4 Firmware
Published: 2020-07-01
Last modified: 2026-06-17

Description

An issue was discovered on Wavlink WL-WN530HG4 M30HG4.V5030.191116 devices. Multiple buffer overflow vulnerabilities exist in CGI scripts, leading to remote code execution with root privileges. (The set of affected scripts is similar to CVE-2020-12266.)

Frequently asked questions

What is CVE-2020-15490?: An issue was discovered on Wavlink WL-WN530HG4 M30HG4.V5030.191116 devices. Multiple buffer overflow vulnerabilities exist in CGI scripts, leading to remote code execution with root privileges. (The set of affected scripts is similar to CVE-2020-12266.)
How severe is CVE-2020-15490?: CVE-2020-15490 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-15490 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15490?: CVE-2020-15490 affects Wavlink Wl-wn530hg4 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15490?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-15490 published?: CVE-2020-15490 was published on 2020-07-01 and last updated on 2026-06-17.

References

https://gitlab.com/drakylar1/drakylar-cve-list/-/blob/master/Wavlink/CVE-2020-15490_multiple_BoF.txt

Affected products (1)

cpe:2.3:o:wavlink:wl-wn530hg4_firmware:m30hg4.v5030.191116:*:*:*:*:*:*:*

More vulnerabilities in Wavlink Wl-wn530hg4 Firmware

CVE-2022-34045 — Critical (CVSS 9.8): Wavlink WN530HG4 M30HG4.V5030.191116 was discovered to contain a hardcoded encryption/decryption key for its…
CVE-2020-15489 — Critical (CVSS 9.8): An issue was discovered on Wavlink WL-WN530HG4 M30HG4.V5030.191116 devices. Multiple shell metacharacter injection…
CVE-2020-10971 — High (CVSS 8.8): An issue was discovered on Wavlink Jetstream devices where a crafted POST request can be sent to adm.cgi that will…
CVE-2022-48166 — High (CVSS 7.5): An access control issue in Wavlink WL-WN530HG4 M30HG4.V5030.201217 allows unauthenticated attackers to download…
CVE-2022-34047 — High (CVSS 7.5): An access control issue in Wavlink WN530HG4 M30HG4.V5030.191116 allows attackers to obtain usernames and passwords via…
CVE-2020-12266 — High (CVSS 7.5): An issue was discovered where there are multiple externally accessible pages that do not require any sort of…

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