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CVE-2025-26696

Crafted email message incorrectly shown as being encrypted

Published: Mar 10, 2025Updated: Apr 13, 2026 Sources: CVE List NVD BDUCWE-290
7.0HIGH
NVD MITRE
EPSS Score
0.3%
Top 75.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Certain crafted MIME email messages that claimed to contain an encrypted OpenPGP message, which instead contained an OpenPGP signed message, were wrongly shown as being encrypted. This vulnerability was fixed in Thunderbird 136 and Thunderbird 128.8.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-290

Affected Products

Mozilla Corp.
oss-project·USaka Mozilla
ThunderbirdOn-premDesktop App
Communications / email-server-client
Thunderbird ESR
Consumer Software
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
АО «ИВК»
commercial·RUaka ivk
АЛЬТ СП 10On-premOS
Operating Systems / linux-distro
and 2 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2025-26696?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1864205
bugzilla.mozilla.org
https://www.mozilla.org/security/advisories/mfsa2025-17/
mozilla.org
https://www.mozilla.org/security/advisories/mfsa2025-18/
mozilla.org
and 6 more references View all →

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