CVE-2015-6574: The SNAP Lite component in certain SISCO MMS-EASE and AX-S4 ICCP products allows remote attackers to cause a d

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HIGH 7.5REMOTEDOWNGRADEDOWNGRADE

CVE-2015-6574 is a high-severity flaw (CVSS 7.5) affecting mms-ease firmware, ax-s4 iccp firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The SNAP Lite component in certain SISCO MMS-EASE and AX-S4 ICCP products allows remote attackers to cause a denial of service (CPU consumption) via a crafted packet.

Why this priority

High severity
EPSS top 7%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.4% (top 7%)
CISA exploited list	No
Weakness	CWE-399
Published	2016-12-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: sisco

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2016-12-15 22:59 UTCPublished CVE record published
2026-06-17 00:31 UTCUpdated Record last modified

sisco mms-ease firmware DOWNGRADE

Affected: 11.2000

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.2000

1. Check installed version

apt-cache policy mms-ease-firmware || rpm -q mms-ease-firmware || mms-ease-firmware --version

2. No fixed release: DOWNGRADE to a release before 11.2000 (Debian / Ubuntu)

apt-cache madison mms-ease-firmware sudo apt install mms-ease-firmware=<VERSION_BEFORE_11.2000> sudo apt-mark hold mms-ease-firmware

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mms-ease-firmware sudo dnf downgrade mms-ease-firmware-<VERSION_BEFORE_11.2000> sudo dnf versionlock add mms-ease-firmware

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

sisco ax-s4 iccp firmware DOWNGRADE

Affected: 6.0000

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0000

1. Check installed version

apt-cache policy ax-s4-iccp-firmware || rpm -q ax-s4-iccp-firmware || ax-s4-iccp-firmware --version

2. No fixed release: DOWNGRADE to a release before 6.0000 (Debian / Ubuntu)

apt-cache madison ax-s4-iccp-firmware sudo apt install ax-s4-iccp-firmware=<VERSION_BEFORE_6.0000> sudo apt-mark hold ax-s4-iccp-firmware

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ax-s4-iccp-firmware sudo dnf downgrade ax-s4-iccp-firmware-<VERSION_BEFORE_6.0000> sudo dnf versionlock add ax-s4-iccp-firmware

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-6574?

mms-ease firmware: downgrade or apply the listed mitigation; ax-s4 iccp firmware: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-6574 being exploited?

CVE-2015-6574 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-6574 affect?

CVE-2015-6574 affects mms-ease firmware, ax-s4 iccp firmware. Severity is high (CVSS 7.5). The SNAP Lite component in certain SISCO MMS-EASE and AX-S4 ICCP products allows remote attackers to cause a denial of service (CPU consumption) via a crafted packet.

How urgent is CVE-2015-6574?

Priority 59/100. High severity; EPSS top 7%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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