Is CVE-2021-35034 in the CISA KEV catalog?

No. CVE-2021-35034 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-35034?

CVE-2021-35034 has a CVSS v3 base score of 7.4 (HIGH).

What is the EPSS score for CVE-2021-35034?

CVE-2021-35034 has an EPSS score of 1.04% (60th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-35034?

Upgrade nbg6604 firmware to 1.00(abir.9)c0 or later.

CVE & CISA-KEV Catalog

CVE-2021-35034

HIGH

7.4

CVSS v3

NVD

Description

An insufficient session expiration vulnerability in the CGI program of the Zyxel NBG6604 firmware could allow a remote attacker to access the device if the correct token can be intercepted.

CWE-613

How to fix

Remediation Available

nbg6604 firmwareNVD

Affected:< 1.00(abir.9)c0Fixed in:1.00(abir.9)c0CVE-2021-35034derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploit Intelligence

1.04%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Vendor Advisory1

zyxel.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.