CVE-2018-9853
CVE-2018-9853 is a critical-severity vulnerability in Freesshd with a CVSS 3.x base score of 9.8. 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-269.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 1% (67th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-269
- Affected product: Freesshd
- Published:
- Last modified:
Description
Insecure access control in freeSSHd version 1.3.1 allows attackers to obtain the privileges of the freesshd.exe process by leveraging the ability to login to an unprivileged account on the server.
Frequently asked questions
- What is CVE-2018-9853?
- Insecure access control in freeSSHd version 1.3.1 allows attackers to obtain the privileges of the freesshd.exe process by leveraging the ability to login to an unprivileged account on the server.
- How severe is CVE-2018-9853?
- CVE-2018-9853 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2018-9853 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-9853?
- CVE-2018-9853 affects Freesshd. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-9853?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2018-9853 published?
- CVE-2018-9853 was published on 2018-07-10 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:freesshd:freesshd:1.3.1:*:*:*:*:*:*:*
More vulnerabilities in Freesshd
- CVE-2012-6066 — Critical (CVSS 9.3): freeSSHd.exe in freeSSHd through 1.2.6 allows remote attackers to bypass authentication via a crafted session, as…
- CVE-2008-6899 — Critical (CVSS 9.0): Multiple buffer overflows in freeSSHd 1.2.1 allow remote authenticated users to cause a denial of service (crash) and…
- CVE-2008-4762 — Critical (CVSS 9.0): Stack-based buffer overflow in freeSSHd 1.2.1 allows remote authenticated users to cause a denial of service (service…
- CVE-2008-2573 — High (CVSS 8.5): Stack-based buffer overflow in SFTP in freeSSHd 1.2.1 allows remote authenticated users to execute arbitrary code via a…
- CVE-2017-1000475 — High (CVSS 7.8): FreeSSHd 1.3.1 version is vulnerable to an Unquoted Path Service allowing local users to launch processes with elevated…
- CVE-2006-2407 — High (CVSS 7.5): Stack-based buffer overflow in (1) WeOnlyDo wodSSHServer ActiveX Component 1.2.7 and 1.3.3 DEMO, as used in other…
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