How severe is CVE-2026-55706?

CVE-2026-55706 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-55706 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-55706?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-55706 have an EU (EUVD) identifier?

Yes. CVE-2026-55706 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37521.

When was CVE-2026-55706 published?

CVE-2026-55706 was published on 2026-06-17.

CVE-2026-55706

CVE-2026-55706 is a medium-severity vulnerability with a CVSS 3.x base score of 5.8. 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-1284.

Key facts

Severity: Medium (CVSS 3.x base score 5.8)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37521
Weakness: CWE-1284
Published: 2026-06-17
Last modified: 2026-06-17

Description

sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.

Frequently asked questions

What is CVE-2026-55706?: sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.
How severe is CVE-2026-55706?: CVE-2026-55706 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-55706 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-55706?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-55706 have an EU (EUVD) identifier?: Yes. CVE-2026-55706 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37521.
When was CVE-2026-55706 published?: CVE-2026-55706 was published on 2026-06-17.

References

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