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CVE-2019-10251

20
FAUCET Score

CVE-2019-10251 describes a vulnerability in the UCWeb UC Browser application for Android, specifically in versions released through March 26, 2019. The browser insecurely downloads PDF and Microsoft Office-related modules via unencrypted HTTP, making it susceptible to Man-in-the-Middle (MITM) attacks. Rated as Medium severity (CVSS 5.9), this vulnerability could allow an attacker to intercept and potentially manipulate these module downloads, leading to high confidentiality impact without requiring user interaction or complex attack conditions. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2019-03-26CPE matchmatch criteria
cpe:2.3:a:ucweb:uc_browser:*:*:*:*:*:android:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.80%
Probability of exploitation in next 30 days
EPSS Percentile
52.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0080 is in the 11th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

news.drweb.com / show
ExploitThird Party Advisory
bleepingcomputer.com / news/security/uc-browser-for-android-desktop-exposes-500-million-users-to-mitm-attacks
ExploitThird Party Advisory