How severe is CVE-2023-30305?

CVE-2023-30305 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-30305 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-30305?

CVE-2023-30305 affects Linksys E5600 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-30305?

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.

Does CVE-2023-30305 have an EU (EUVD) identifier?

Yes. CVE-2023-30305 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-34728.

When was CVE-2023-30305 published?

CVE-2023-30305 was published on 2024-05-28 and last updated on 2026-06-17.

CVE-2023-30305

CVE-2023-30305 is a high-severity vulnerability in Linksys E5600 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-34728
Affected product: Linksys E5600 Firmware
Published: 2024-05-28
Last modified: 2026-06-17

Description

An issue discovered in Linksys E5600 routers allows attackers to hijack TCP sessions which could lead to a denial of service.

Frequently asked questions

What is CVE-2023-30305?: An issue discovered in Linksys E5600 routers allows attackers to hijack TCP sessions which could lead to a denial of service.
How severe is CVE-2023-30305?: CVE-2023-30305 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-30305 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-30305?: CVE-2023-30305 affects Linksys E5600 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-30305?: 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.
Does CVE-2023-30305 have an EU (EUVD) identifier?: Yes. CVE-2023-30305 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-34728.
When was CVE-2023-30305 published?: CVE-2023-30305 was published on 2024-05-28 and last updated on 2026-06-17.

References

https://www.ndss-symposium.org/ndss-paper/exploiting-sequence-number-leakage-tcp-hijacking-in-nat-enabled-wi-fi-networks/

Affected products (1)

cpe:2.3:o:linksys:e5600_firmware:-:*:*:*:*:*:*:*