CVE-2020-27383
CVE-2020-27383 is a high-severity vulnerability in Blizzard Battle.net with a CVSS 3.x base score of 7.8. 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-281.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v2: 4.6
- EPSS exploit prediction: 0% (24th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-281
- Affected product: Blizzard Battle.net
- Published:
- Last modified:
Description
Battle.net.exe in Battle.Net 1.27.1.12428 suffers from an elevation of privileges vulnerability which can be used by an "Authenticated User" to modify the existing executable file with a binary of his choice. The vulnerability exist due to weak set of permissions being granted to the "Authenticated Users Group" which grants the (F) Flag aka "Full Control"
Frequently asked questions
- What is CVE-2020-27383?
- Battle.net.exe in Battle.Net 1.27.1.12428 suffers from an elevation of privileges vulnerability which can be used by an "Authenticated User" to modify the existing executable file with a binary of his choice. The vulnerability exist due to weak set of permissions being granted to the "Authenticated Users Group" which grants the (F) Flag aka "Full Control"
- How severe is CVE-2020-27383?
- CVE-2020-27383 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-27383 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-27383?
- CVE-2020-27383 affects Blizzard Battle.net. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-27383?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-27383 published?
- CVE-2020-27383 was published on 2021-06-09 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:blizzard:battle.net:1.27.1.12428:*:*:*:*:*:*:*
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