How severe is CVE-2018-25220?

CVE-2018-25220 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-2018-25220 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-25220?

CVE-2018-25220 affects Bochs Project Bochs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-25220?

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.

Does CVE-2018-25220 have an EU (EUVD) identifier?

Yes. CVE-2018-25220 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-21698.

When was CVE-2018-25220 published?

CVE-2018-25220 was published on 2026-03-28 and last updated on 2026-06-17.

CVE-2018-25220

CVE-2018-25220 is a critical-severity vulnerability in Bochs Project Bochs 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2018-21698
Weakness: CWE-787
Affected product: Bochs Project Bochs
Published: 2026-03-28
Last modified: 2026-06-17

Description

Bochs 2.6-5 contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by supplying an oversized input string to the application. Attackers can craft a malicious payload with 1200 bytes of padding followed by a return-oriented programming chain to overwrite the instruction pointer and execute shell commands with application privileges.

Frequently asked questions

What is CVE-2018-25220?: Bochs 2.6-5 contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by supplying an oversized input string to the application. Attackers can craft a malicious payload with 1200 bytes of padding followed by a return-oriented programming chain to overwrite the instruction pointer and execute shell commands with application privileges.
How severe is CVE-2018-25220?: CVE-2018-25220 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-2018-25220 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-25220?: CVE-2018-25220 affects Bochs Project Bochs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-25220?: 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.
Does CVE-2018-25220 have an EU (EUVD) identifier?: Yes. CVE-2018-25220 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-21698.
When was CVE-2018-25220 published?: CVE-2018-25220 was published on 2026-03-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:bochs_project:bochs:2.6.5:*:*:*:*:*:*:*

More vulnerabilities in Bochs Project Bochs

CVE-2007-2893 — High (CVSS 7.2): Heap-based buffer overflow in the bx_ne2k_c::rx_frame function in iodev/ne2k.cc in the emulated NE2000 device in Bochs…
CVE-2004-2372 — High (CVSS 7.2): Buffer overflow in Bochs before 2.1.1, if installed setuid, allows local users to execute arbitrary code via a long…
CVE-2007-2894 — Low (CVSS 2.1): The emulated floppy disk controller in Bochs 2.3 allows local users of the guest operating system to cause a denial of…

All CVEs affecting Bochs Project Bochs →

Other CWE-787 (Out-of-bounds Write) vulnerabilities

CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules). This vulnerability is…
CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…

Browse all CWE-787 (Out-of-bounds Write) vulnerabilities →