Is CVE-2021-28838 in the CISA KEV catalog?

No. CVE-2021-28838 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-28838?

CVE-2021-28838 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-28838?

CVE-2021-28838 has an EPSS score of 2.16% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-28838?

Upgrade dap-2330 firmware to 1.10rc036 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2021-28838

HIGHEPSS 80th pctl

7.5

CVSS v3

NVD

Description

Null pointer dereference vulnerability in D-Link DAP-2310 2,10RC039, DAP-2330 1.10RC036 BETA, DAP-2360 2.10RC055, DAP-2553 3.10rc039 BETA, DAP-2660 1.15rc131b, DAP-2690 3.20RC115 BETA, DAP-2695 1.20RC093, DAP-3320 1.05RC027 BETA and DAP-3662 1.05rc069 in the sbin/httpd binary. The crash happens at the `atoi' operation when a specific network package are sent to the httpd binary.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

dap-2330 firmwareNVD

Affected:< 1.10rc036Fixed in:1.10rc036CVE-2021-28838derived from NVD

dap-2553 firmwareNVD

Affected:< 3.10rc039Fixed in:3.10rc039CVE-2021-28838derived from NVD

dap-2690 firmwareNVD

Affected:< 3.20rc115Fixed in:3.20rc115CVE-2021-28838derived from NVD

dap-3320 firmwareNVD

Affected:< 1.05rc027Fixed in:1.05rc027CVE-2021-28838derived from NVD

dap-3662 firmwareNVD

Affected:< 1.05rc069Fixed in:1.05rc069CVE-2021-28838derived 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 ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.16%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Exploit1

github.com

Vendor Advisory1

dlink.com

Third-Party Advisory1

github.com

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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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.