7-Zip · 7-Zip · 7-Zip Mark of the Web Bypass Vulnerability
Verdict
Patch soon · actively exploited, not reachable unauthenticated from the internet, and in the top 1% of CVEs by near-term exploitation probability
Added to CISA KEV 2025-02-06 · exploited in the wild for 598 days
CVSS 7.0 HIGH. The score is a summary; these three components are the part that decides whether something scanning the internet can use it.
| Attack vector | localrequires local access to the machine |
|---|---|
| Privileges required | noneneeds no credentials at all |
| User interaction | requiredneeds a user to click, load or submit something first |
| Base vector | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Weakness | CWE-693 |
This describes the vulnerability. It says nothing about whether your systems run it.
EPSS puts the probability of exploitation in the next 30 days at 0.6707, which places it in the top 1% of all tracked CVEs. The percentile is the more useful half: 0.18 in absolute terms sounds low until you know most of the internet-facing software in the world scores under that.
| EPSS probability | 0.6707 |
|---|---|
| Percentile | 0.993 — top 1% |
| Added to KEV | 2025-02-06 |
|---|---|
| Days exploited | 598 |
| Federal remediation due | not set |
| Ransomware use | no known ransomware campaign use |
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
7-Zip Mark-of-the-Web Bypass Vulnerability. This vulnerability allows remote attackers to bypass the Mark-of-the-Web protection mechanism on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of archived files. When extracting files from a crafted archive that bears the Mark-of-the-Web, 7-Zip does not propagate the Mark-of-the-Web to the extracted files. An attacker can leverage this vulnerability to execute arbitrary code in the context of the current user. Was ZDI-CAN-25456.