How severe is CVE-2026-106553?

CVE-2026-106553 has a CVSS 3.x base score of 2.2, rated low severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-106553 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-106553?

CVE-2026-106553 affects Openbsd Openssh. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-106553?

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

When was CVE-2026-106553 published?

CVE-2026-106553 was published on 2026-10-06 and last updated on 2026-10-13.

CVE-2026-106553

CVE-2026-106553 is a low-severity vulnerability in Openbsd Openssh with a CVSS 3.x base score of 2.2. 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-669.

Key facts

Severity: Low (CVSS 3.x base score 2.2)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-669
Affected product: Openbsd Openssh
Published: 2026-10-06
Last modified: 2026-10-13

Description

In sshd in OpenSSH before 10.6, credentials can incorrectly persist after failure of a GSSAPIAuthentication authentication attempt.

Frequently asked questions

What is CVE-2026-106553?: In sshd in OpenSSH before 10.6, credentials can incorrectly persist after failure of a GSSAPIAuthentication authentication attempt.
How severe is CVE-2026-106553?: CVE-2026-106553 has a CVSS 3.x base score of 2.2, rated low severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-106553 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-106553?: CVE-2026-106553 affects Openbsd Openssh. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-106553?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-106553 published?: CVE-2026-106553 was published on 2026-10-06 and last updated on 2026-10-13.

References

https://www.openssh.org/releasenotes.html#10.6

Affected products (1)

cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*

More vulnerabilities in Openbsd Openssh

CVE-2003-0786 — Critical (CVSS 10.0): The SSH1 PAM challenge response authentication in OpenSSH 3.7.1 and 3.7.1p1, when Privilege Separation is disabled,…
CVE-2003-0693 — Critical (CVSS 10.0): A "buffer management error" in buffer_append_space of buffer.c for OpenSSH before 3.7 may allow remote attackers to…
CVE-2002-0640 — Critical (CVSS 10.0): Buffer overflow in sshd in OpenSSH 2.3.1 through 3.3 may allow remote attackers to execute arbitrary code via a large…
CVE-2001-0144 — Critical (CVSS 10.0): CORE SDI SSH1 CRC-32 compensation attack detector allows remote attackers to execute arbitrary commands on an SSH…
CVE-2000-0999 — Critical (CVSS 10.0): Format string vulnerabilities in OpenBSD ssh program (and possibly other BSD-based operating systems) allow attackers…
CVE-2000-0525 — Critical (CVSS 10.0): OpenSSH does not properly drop privileges when the UseLogin option is enabled, which allows local users to execute…

All CVEs affecting Openbsd Openssh →

Other CWE-669 vulnerabilities

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CVE-2022-4446 — Critical (CVSS 9.8): PHP Remote File Inclusion in GitHub repository tsolucio/corebos prior to 8.0.
CVE-2020-24683 — Critical (CVSS 9.8): The affected versions of S+ Operations (version 2.1 SP1 and earlier) used an approach for user authentication which…
CVE-2020-5800 — Critical (CVSS 9.8): The Eat Spray Love mobile app for both iOS and Android contains logic that allows users to bypass authentication and…
CVE-2020-15892 — Critical (CVSS 9.8): An issue was discovered in apply.cgi on D-Link DAP-1520 devices before 1.10b04Beta02. Whenever a user performs a login…

Browse all CWE-669 vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

111.229.155.203 (ipv4-addr)
162.245.218.45 (ipv4-addr)
117.24.243.99 (ipv4-addr)
162.214.74.29 (ipv4-addr)
195.154.199.162 (ipv4-addr)
120.79.247.255 (ipv4-addr)
162.19.251.6 (ipv4-addr)
142.86.120.115 (ipv4-addr)