PatchTheCVECVE-2021-40835: An URL Address bar spoofing vulnerability was discovered in Safe Browser for iOS
CVE-2021-40835 is a medium-severity flaw (CVSS 4.6) affecting safe. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An URL Address bar spoofing vulnerability was discovered in Safe Browser for iOS. When user clicks on a specially crafted a malicious URL, if user does not carefully pay attention to url, user may be tricked to think content may be coming from a valid domain, while it comes from another. This is performed by using a very long username part of the url so that user cannot see the domain name. A remote attacker can leverage this to perform url addre
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.6 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | Required |
| EPSS exploit chance | 0.7% (top 46%) |
| CISA exploited list | No |
| Published | 2021-12-16 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-40835?
safe: upgrade to 18.3. Exact commands for each OS are on this page.
Is CVE-2021-40835 being exploited?
CVE-2021-40835 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-40835 affect?
CVE-2021-40835 affects safe. Severity is medium (CVSS 4.6). An URL Address bar spoofing vulnerability was discovered in Safe Browser for iOS. When user clicks on a specially crafted a malicious URL, if user does not carefully pay attention to url, user may be tricked to think content may be coming f
How urgent is CVE-2021-40835?
Priority 30/100. No elevated risk signals yet.
Software pages
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