CVE-2026-74983

Data loss prevention bypass via undisclosed flaw

Published Aug 18, 2026 · Updated Aug 19, 2026

Mitigation bypass in Mozilla Firefox and Thunderbird allows attackers to evade Data Loss Prevention controls via unspecified vectors. Mozilla has not published the faulty code path or the operation that mishandles untrusted input; the linked security bug is access-restricted. The disclosed impact is limited to bypass of configured DLP protections, and no further consequence or exploitation gate is public.

CVSS severity3.4
Low
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Mitigation bypass in Mozilla Firefox and Thunderbird allows attackers to evade Data Loss Prevention controls via unspecified vectors. Mozilla has not published the faulty code path or the operation that mishandles untrusted input; the linked security bug is access-restricted. The disclosed impact is limited to bypass of configured DLP protections, and no further consequence or exploitation gate is public.

The record

CVE
CVE-2026-74983
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-807
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.4Oracle LinuxCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-807Reliance on Untrusted Inputs in a Security Decision

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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