VIR Vulnerability Intelligence Relay

CVE-2015-6321

high
Published 2015-11-06 · Modified 2026-05-06
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
—
CVSS v4 NEW
—
not yet in upstream
VIR risk
7.8

Description

Cisco AsyncOS before 8.5.7-042, 9.x before 9.1.0-032, 9.1.x before 9.1.1-023, and 9.5.x and 9.6.x before 9.6.0-042 on Email Security Appliance (ESA) devices; before 9.1.0-032, 9.1.1 before 9.1.1-005, and 9.5.x before 9.5.0-025 on Content Security Management Appliance (SMA) devices; and before 7.7.0-725 and 8.x before 8.0.8-113 on Web Security Appliance (WSA) devices allows remote attackers to cause a denial of service (memory consumption) via a flood of TCP packets, aka Bug IDs CSCus79774, CSCus79777, and CSCzv95795.

Predictions

Exploit likelihood
20%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Application impact
VendorProductVersionsFixed
cisco ciscoweb_security_appliance5.6.0-623
cisco ciscoweb_security_appliance6.0.0-000
cisco ciscoweb_security_appliance7.5.0-000
cisco ciscoweb_security_appliance7.5.0-825
cisco ciscoweb_security_appliance7.5.1-000
cisco ciscoweb_security_appliance7.5.2-000
cisco ciscoweb_security_appliance7.7.0-000
cisco ciscoweb_security_appliance7.7.1-000
cisco ciscoweb_security_appliance8.0.0-000
cisco ciscoweb_security_appliance8.5.0.000
cisco ciscocontent_security_management_appliance7.8.0-328
cisco ciscocontent_security_management_appliance7.8.1-001
cisco ciscocontent_security_management_appliance7.9.0-201
cisco ciscocontent_security_management_appliance7.9.2-116
cisco ciscocontent_security_management_appliance8.0.1-031
cisco ciscocontent_security_management_appliance8.1.0-001
cisco ciscocontent_security_management_appliance8.1.1-033
cisco ciscocontent_security_management_appliance8.1.2-000
cisco ciscocontent_security_management_appliance8.2.0-238
cisco ciscocontent_security_management_appliance8.3.0-350
cisco ciscocontent_security_management_appliance8.3.5-061
cisco ciscocontent_security_management_appliance8.3.6-014
cisco ciscocontent_security_management_appliance8.3.7-010
cisco ciscocontent_security_management_appliance8.4.0-150
cisco ciscocontent_security_management_appliance9.0.0-073
cisco ciscocontent_security_management_appliance9.1.0-004
cisco ciscoemail_security_appliance7.6.1-000
cisco ciscoemail_security_appliance7.6.3-000
cisco ciscoemail_security_appliance7.7.0-000
cisco ciscoemail_security_appliance7.7.1-000
cisco ciscoemail_security_appliance7.8.0-311
cisco ciscoemail_security_appliance8.5.6-052
cisco ciscoemail_security_appliance8.6.0-011
cisco ciscoemail_security_appliance8.9.1-000
cisco ciscoemail_security_appliance8.9.2-032
cisco ciscoemail_security_appliance9.0.0-212
cisco ciscoemail_security_appliance9.0.5-000
cisco ciscoemail_security_appliance9.1.0-011
cisco ciscoemail_security_appliance9.4.4-000
cisco ciscoemail_security_appliance9.5.0-000

References

CWEs

CWE-399

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.