How severe is CVE-2019-6989?

CVE-2019-6989 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-6989 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-6989?

CVE-2019-6989 primarily affects Tp-link Tl-wr940n Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-6989?

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-2019-6989 published?

CVE-2019-6989 was published on 2019-06-06 and last updated on 2026-06-17.

CVE-2019-6989

CVE-2019-6989 is a high-severity vulnerability in Tp-link Tl-wr940n Firmware with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Tp-link Tl-wr940n Firmware
Published: 2019-06-06
Last modified: 2026-06-17

Description

TP-Link TL-WR940N is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the ipAddrDispose function. By sending specially crafted ICMP echo request packets, a remote authenticated attacker could overflow a buffer and execute arbitrary code on the system with elevated privileges.

Frequently asked questions

What is CVE-2019-6989?: TP-Link TL-WR940N is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the ipAddrDispose function. By sending specially crafted ICMP echo request packets, a remote authenticated attacker could overflow a buffer and execute arbitrary code on the system with elevated privileges.
How severe is CVE-2019-6989?: CVE-2019-6989 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-6989 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-6989?: CVE-2019-6989 primarily affects Tp-link Tl-wr940n Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-6989?: 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-2019-6989 published?: CVE-2019-6989 was published on 2019-06-06 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:tp-link:tl-wr940n_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:tp-link:tl-wr941nd_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Tp-link Tl-wr940n Firmware

CVE-2023-36355 — Critical (CVSS 9.9): TP-Link TL-WR940N V4 was discovered to contain a buffer overflow via the ipStart parameter at…
CVE-2023-33538 — High (CVSS 8.8): TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain a command injection…
CVE-2022-43636 — High (CVSS 8.8): This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of TP-Link…
CVE-2022-24355 — High (CVSS 8.8): This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link…
CVE-2025-6151 — High (CVSS 8.2): A vulnerability has been found in TP-Link TL-WR940N V4 and TL-WR841N V11. Affected by this issue is some unknown…
CVE-2023-33537 — High (CVSS 8.1): TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain a buffer overflow via the…

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