How severe is CVE-2017-11696?

CVE-2017-11696 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-11696 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-11696?

CVE-2017-11696 affects Mozilla Network Security Services. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-11696?

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-2017-11696 published?

CVE-2017-11696 was published on 2017-12-27 and last updated on 2026-06-17.

CVE-2017-11696

CVE-2017-11696 is a high-severity vulnerability in Mozilla Network Security Services with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Mozilla Network Security Services
Published: 2017-12-27
Last modified: 2026-06-17

Description

Heap-based buffer overflow in the __hash_open function in lib/dbm/src/hash.c in Mozilla Network Security Services (NSS) allows context-dependent attackers to have unspecified impact using a crafted cert8.db file.

Frequently asked questions

What is CVE-2017-11696?: Heap-based buffer overflow in the __hash_open function in lib/dbm/src/hash.c in Mozilla Network Security Services (NSS) allows context-dependent attackers to have unspecified impact using a crafted cert8.db file.
How severe is CVE-2017-11696?: CVE-2017-11696 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-11696 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-11696?: CVE-2017-11696 affects Mozilla Network Security Services. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-11696?: 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-2017-11696 published?: CVE-2017-11696 was published on 2017-12-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mozilla:network_security_services:-:*:*:*:*:*:*:*

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