CVE-2015-6291

highpriority · track · 32EPSS 0.019 · 80 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.93% (80th) EPSS

CVSS 7.8 · high

Is it mine?

17 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

Cisco AsyncOS before 8.5.7-043, 9.x before 9.1.1-023, and 9.5.x and 9.6.x before 9.6.0-046 on Email Security Appliance (ESA) devices mishandles malformed fields during body-contains, attachment-contains, every-attachment-contains, attachment-binary-contains, dictionary-match, and attachment-dictionary-match filtering, which allows remote attackers to cause a denial of service (memory consumption) via a crafted attachment in an e-mail message, aka Bug ID CSCuv47151.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v2.06.6mediumAV:N/AC:L/Au:N/C:N/I:N/A:C/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimary

affected products (17)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
cisco email security appliance= 7.7.0-000nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 7.7.1-000nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 8.0_basenvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 8.5.6-052nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 8.5.6-073nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 8.5.6-074nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 8.5.6-106nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 8.5.6-113nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 8.5.7-042nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 8.5_basenvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 9.0.0nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 9.0.0-212nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 9.0.0-461nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 9.0.5-000nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 9.1.0-032nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco email security appliance= 9.6.0-042nvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2015-11-06modified 2026-06-17

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+25171 more

references (5)

External citations — patches, advisories, analysis.

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