[UPDATE] [medium] OpenSSH: Multiple vulnerabilities

mediumCVE-2023-28531

A local attacker can exploit multiple vulnerabilities in OpenSSH to bypass security measures or cause a denial of service state.

CSIRTS triage

vendor: OpenSSH product: OpenSSH Authentication bypass Denial of service

What: Multiple vulnerabilities in OpenSSH can be exploited by a local attacker to bypass security measures or cause a denial of service state.
Who is affected: Local attackers on systems running the affected versions of OpenSSH.
Urgency: Remediation is medium urgency due to the potential for denial of service and security bypass.
Action: Apply the latest updates for OpenSSH.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-0670

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Moderate exploitation riskCVE-2023-285312.3% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 81% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2023-28531	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownexploitedSiemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFPcisa
unknownMultiple vulnerabilities in Siemens products (July 15, 2026)cert-fr-avis

Recent advisories for OpenSSH

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[NEW] [medium] OpenSSH: Multiple vulnerabilitiescert-bund · 2026-07-31
medium[UPDATE] [medium] OpenSSH: Multiple vulnerabilitiescert-bund · 2026-07-31
medium[UPDATE] [medium] OpenSSH: Vulnerability allows bypassing of security measurescert-bund · 2026-07-30
medium[UPDATE] [medium] OpenSSH: Multiple vulnerabilitiescert-bund · 2026-07-22
unknownUSN-8577-1: OpenSSH vulnerabilityubuntu · 2026-07-21
low[UPDATE] [low] OpenSSH: Multiple vulnerabilities allow code executioncert-bund · 2026-07-21