How severe is CVE-2015-5621?

CVE-2015-5621 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-2015-5621 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 40% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5621?

CVE-2015-5621 affects Net-snmp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-5621?

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-2015-5621 published?

CVE-2015-5621 was published on 2015-08-19 and last updated on 2026-06-17.

CVE-2015-5621

CVE-2015-5621 is a high-severity vulnerability in Net-snmp with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 40% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-19.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.5
EPSS exploit prediction: 40% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-19
Affected product: Net-snmp
Published: 2015-08-19
Last modified: 2026-06-17

Description

The snmp_pdu_parse function in snmp_api.c in net-snmp 5.7.2 and earlier does not remove the varBind variable in a netsnmp_variable_list item when parsing of the SNMP PDU fails, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted packet.

Frequently asked questions

What is CVE-2015-5621?: The snmp_pdu_parse function in snmp_api.c in net-snmp 5.7.2 and earlier does not remove the varBind variable in a netsnmp_variable_list item when parsing of the SNMP PDU fails, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted packet.
How severe is CVE-2015-5621?: CVE-2015-5621 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-2015-5621 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 40% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5621?: CVE-2015-5621 affects Net-snmp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-5621?: 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-2015-5621 published?: CVE-2015-5621 was published on 2015-08-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:net-snmp:net-snmp:*:*:*:*:*:*:*:*

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