CVE-2021-35034

Q: How do I fix CVE-2021-35034?

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

Q: Is CVE-2021-35034 being actively exploited?

Not that we know of. CVE-2021-35034 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.0% is the estimated probability that it will be exploited in the next 30 days. That is higher than 61% of all scored CVEs.

Q: How severe is CVE-2021-35034?

CVE-2021-35034 has a CVSS v3 base score of 7.4, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2021-35034 affect?

Published advisories record a fix for nbg6604 firmware (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

61stpercentile

Moderate risk: more likely to be exploited than 61% of all known CVEs.

References

Vendor Advisory1

zyxel.com

Related Vulnerabilities

Other CWE-613 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-2595	Critical	9.8	17%	-	-
CVE-2023-30403	High	7.5	14%	-	-
CVE-2020-27422	Critical	9.8	7.8%	-	-
CVE-2014-3616	Medium	4.3	5.7%	-	Fix
CVE-2021-3144	Critical	9.1	5.2%	-	Fix
CVE-2021-24019	High	8.1	3.9%	-	Fix

Common questions

How do I fix CVE-2021-35034?

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

Is CVE-2021-35034 being actively exploited?

Not that we know of. CVE-2021-35034 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.0% is the estimated probability that it will be exploited in the next 30 days. That is higher than 61% of all scored CVEs.

How severe is CVE-2021-35034?

CVE-2021-35034 has a CVSS v3 base score of 7.4, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2021-35034 affect?

Published advisories record a fix for nbg6604 firmware (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2021-35034

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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.