8.3

CVE-2026-55706: openbsd

Analyzed
Published 17-06-2026Last modified 17-06-2026

Vulnerability summary

CVE-2026-55706 is a high (CVSS 8.3) vulnerability in openbsd. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 29.1% of scored vulnerabilities. 3 public exploits are recorded.

Priority
Routine

Not severe (CVSS 5.8, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.3/10
010
High · v3.1 (NVD)
EPSS score
0.35%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits3reference

Timeline

  1. 17-06-2026
    PublishedVulnerability first disclosed.
  2. 17-06-2026
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.34% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

3 found
  • referenceUnverified

    Exploit Reference (blog.argus-systems.ai)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (blog.argus-systems.ai)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (openwall.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Openbsd1 product
  • openbsd< 076e2b1c1fc4ac0883a72d3544131ad5cee7adf8 | ≤ 7.6

1 vendor · 1 product

References

4 links