Review reviewHigh

CVE-2026-55706

OpenBSD OpenBSD, openbsd

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

CVSS
8.3
EPSS
0.35%
28.1% percentile
CISA KEV
Not listed
Published
2026.06.17
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.35%
Technical severityCVSS 8.3

Vulnerability overview

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

Affected product and versions

Product
OpenBSD OpenBSD, openbsd
Affected versions
< 076e2b1c1fc4ac0883a72d3544131ad5cee7adf8, <= 7.6
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that OpenBSD OpenBSD, openbsd and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE
CWE-1284
CVE-2026-55706 — OpenBSD OpenBSD, openbsd | SECUFOCUS NOW