How severe is CVE-2015-0843?

CVE-2015-0843 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-0843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-0843?

CVE-2015-0843 primarily affects Debian Yubiserver. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-0843?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2015-0843 have an EU (EUVD) identifier?

Yes. CVE-2015-0843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2015-0855.

When was CVE-2015-0843 published?

CVE-2015-0843 was published on 2025-06-26 and last updated on 2026-06-17.

CVE-2015-0843

CVE-2015-0843 is a critical-severity vulnerability in Debian Yubiserver with a CVSS 3.x base score of 9.8. 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2015-0855
Weakness: CWE-120
Affected product: Debian Yubiserver
Published: 2025-06-26
Last modified: 2026-06-17

Description

yubiserver before 0.6 is prone to buffer overflows due to misuse of sprintf.

Frequently asked questions

What is CVE-2015-0843?: yubiserver before 0.6 is prone to buffer overflows due to misuse of sprintf.
How severe is CVE-2015-0843?: CVE-2015-0843 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-0843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-0843?: CVE-2015-0843 primarily affects Debian Yubiserver. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-0843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2015-0843 have an EU (EUVD) identifier?: Yes. CVE-2015-0843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2015-0855.
When was CVE-2015-0843 published?: CVE-2015-0843 was published on 2025-06-26 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:debian:yubiserver:0.2-2:*:*:*:*:*:*:*
cpe:2.3:a:debian:yubiserver:0.5-2:*:*:*:*:*:*:*

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