How severe is CVE-2020-10551?

CVE-2020-10551 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-2020-10551 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-10551?

CVE-2020-10551 affects Tencent Qqbrowser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-10551?

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-2020-10551 published?

CVE-2020-10551 was published on 2020-04-09 and last updated on 2026-06-17.

CVE-2020-10551

CVE-2020-10551 is a high-severity vulnerability in Tencent Qqbrowser 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-732.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Tencent Qqbrowser
Published: 2020-04-09
Last modified: 2026-06-17

Description

QQBrowser before 10.5.3870.400 installs a Windows service TsService.exe. This file is writable by anyone belonging to the NT AUTHORITY\Authenticated Users group, which includes all local and remote users. This can be abused by local attackers to escalate privileges to NT AUTHORITY\SYSTEM by writing a malicious executable to the location of TsService.

Frequently asked questions

What is CVE-2020-10551?: QQBrowser before 10.5.3870.400 installs a Windows service TsService.exe. This file is writable by anyone belonging to the NT AUTHORITY\Authenticated Users group, which includes all local and remote users. This can be abused by local attackers to escalate privileges to NT AUTHORITY\SYSTEM by writing a malicious executable to the location of TsService.
How severe is CVE-2020-10551?: CVE-2020-10551 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-2020-10551 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-10551?: CVE-2020-10551 affects Tencent Qqbrowser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-10551?: 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-2020-10551 published?: CVE-2020-10551 was published on 2020-04-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tencent:qqbrowser:*:*:*:*:*:*:*:*

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