How severe is CVE-2024-42520?

CVE-2024-42520 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-2024-42520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-42520?

CVE-2024-42520 affects Totolink A3002r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-42520?

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.

Does CVE-2024-42520 have an EU (EUVD) identifier?

Yes. CVE-2024-42520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-39659.

When was CVE-2024-42520 published?

CVE-2024-42520 was published on 2024-08-12 and last updated on 2026-06-17.

CVE-2024-42520

CVE-2024-42520 is a critical-severity vulnerability in Totolink A3002r 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)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-39659
Weakness: CWE-120
Affected product: Totolink A3002r Firmware
Published: 2024-08-12
Last modified: 2026-06-17

Description

TOTOLINK A3002R v4.0.0-B20230531.1404 contains a buffer overflow vulnerability in /bin/boa via formParentControl.

Frequently asked questions

What is CVE-2024-42520?: TOTOLINK A3002R v4.0.0-B20230531.1404 contains a buffer overflow vulnerability in /bin/boa via formParentControl.
How severe is CVE-2024-42520?: CVE-2024-42520 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-2024-42520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-42520?: CVE-2024-42520 affects Totolink A3002r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-42520?: 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.
Does CVE-2024-42520 have an EU (EUVD) identifier?: Yes. CVE-2024-42520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-39659.
When was CVE-2024-42520 published?: CVE-2024-42520 was published on 2024-08-12 and last updated on 2026-06-17.

References

https://github.com/c10uds/totolink_A3002R_stackoverflow

Affected products (1)

cpe:2.3:o:totolink:a3002r_firmware:4.0.0-b20230531.1404:*:*:*:*:*:*:*

More vulnerabilities in Totolink A3002r Firmware

CVE-2025-55591 — Critical (CVSS 9.8): TOTOLINK-A3002R v4.0.0-B20230531.1404 was discovered to contain a command injection vulnerability in the devicemac…
CVE-2025-45863 — Critical (CVSS 9.8): TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a buffer overflow via the macstr parameter in the…
CVE-2025-45865 — Critical (CVSS 9.8): TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a buffer overflow via the dnsaddr parameter in the…
CVE-2025-45861 — Critical (CVSS 9.8): TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a buffer overflow via the routername parameter in the…
CVE-2025-45858 — Critical (CVSS 9.8): TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a command injection vulnerability via the FUN_00459fdc…
CVE-2025-25579 — Critical (CVSS 9.8): TOTOLINK A3002R V4.0.0-B20230531.1404 is vulnerable to Command Injection in /bin/boa via bandstr.

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