How severe is CVE-2020-9374?

CVE-2020-9374 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-2020-9374 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 42% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9374?

CVE-2020-9374 affects Tp-link Tl-wr849n Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9374?

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-2020-9374 published?

CVE-2020-9374 was published on 2020-02-24 and last updated on 2026-06-17.

CVE-2020-9374

CVE-2020-9374 is a critical-severity vulnerability in Tp-link Tl-wr849n Firmware with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 42% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 42% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Tp-link Tl-wr849n Firmware
Published: 2020-02-24
Last modified: 2026-06-17

Description

On TP-Link TL-WR849N 0.9.1 4.16 devices, a remote command execution vulnerability in the diagnostics area can be exploited when an attacker sends specific shell metacharacters to the panel's traceroute feature.

Frequently asked questions

What is CVE-2020-9374?: On TP-Link TL-WR849N 0.9.1 4.16 devices, a remote command execution vulnerability in the diagnostics area can be exploited when an attacker sends specific shell metacharacters to the panel's traceroute feature.
How severe is CVE-2020-9374?: CVE-2020-9374 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-2020-9374 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 42% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9374?: CVE-2020-9374 affects Tp-link Tl-wr849n Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9374?: 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-2020-9374 published?: CVE-2020-9374 was published on 2020-02-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tp-link:tl-wr849n_firmware:0.9.1_4.16:*:*:*:*:*:*:*

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