CVE-2007-1066: Cisco Secure Services Client (CSSC) 4.x, Trust Agent 1.x and 2.x, Cisco Security Agent (CSA) 5.0 and 5.1 (when

Routine

MEDIUM 6.8DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2007-1066 is a medium-severity flaw (CVSS 6.8) affecting secure services client, security agent, trust agent. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cisco Secure Services Client (CSSC) 4.x, Trust Agent 1.x and 2.x, Cisco Security Agent (CSA) 5.0 and 5.1 (when a vulnerable Trust Agent has been deployed), and the Meetinghouse AEGIS SecureConnect Client use an insecure default Discretionary Access Control Lists (DACL) for the connection client GUI, which allows local users to gain privileges by injecting "a thread under ConnectionClient.exe," aka CSCsg20558.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Published	2007-02-22
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: cisco · meetinghouse

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-02-22 01:28 UTCPublished CVE record published
2026-06-16 22:36 UTCUpdated Record last modified

cisco secure services client DOWNGRADE

Affected: 4.0 · 4.0.5 · 4.0.51

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy secure-services-client || rpm -q secure-services-client || secure-services-client --version

2. No fixed release: DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison secure-services-client sudo apt install secure-services-client=<VERSION_BEFORE_4.0> sudo apt-mark hold secure-services-client

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

dnf --showduplicates list secure-services-client sudo dnf downgrade secure-services-client-<VERSION_BEFORE_4.0> sudo dnf versionlock add secure-services-client

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.

cisco security agent DOWNGRADE

Affected: 5.0 · 5.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0

1. Check installed version

apt-cache policy security-agent || rpm -q security-agent || security-agent --version

2. No fixed release: DOWNGRADE to a release before 5.0 (Debian / Ubuntu)

apt-cache madison security-agent sudo apt install security-agent=<VERSION_BEFORE_5.0> sudo apt-mark hold security-agent

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

dnf --showduplicates list security-agent sudo dnf downgrade security-agent-<VERSION_BEFORE_5.0> sudo dnf versionlock add security-agent

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.

cisco trust agent DOWNGRADE

Affected: 1.0 · 2.0 · 2.0.1 · 2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy trust-agent || rpm -q trust-agent || trust-agent --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison trust-agent sudo apt install trust-agent=<VERSION_BEFORE_1.0> sudo apt-mark hold trust-agent

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

dnf --showduplicates list trust-agent sudo dnf downgrade trust-agent-<VERSION_BEFORE_1.0> sudo dnf versionlock add trust-agent

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.

meetinghouse aegis secureconnect client DOWNGRADE

Affected: windows_platform

Fixed in: no fixed release known

Safe to downgrade to: a release before windows_platform

1. Check installed version

apt-cache policy aegis-secureconnect-client || rpm -q aegis-secureconnect-client || aegis-secureconnect-client --version

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

apt-cache madison aegis-secureconnect-client sudo apt install aegis-secureconnect-client=<VERSION_BEFORE_windows_platform> sudo apt-mark hold aegis-secureconnect-client

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

dnf --showduplicates list aegis-secureconnect-client sudo dnf downgrade aegis-secureconnect-client-<VERSION_BEFORE_windows_platform> sudo dnf versionlock add aegis-secureconnect-client

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-2007-1066?

secure services client: downgrade or apply the listed mitigation; security agent: downgrade or apply the listed mitigation; trust agent: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-1066 being exploited?

CVE-2007-1066 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-2007-1066 affect?

CVE-2007-1066 affects secure services client, security agent, trust agent. Severity is medium (CVSS 6.8). Cisco Secure Services Client (CSSC) 4.x, Trust Agent 1.x and 2.x, Cisco Security Agent (CSA) 5.0 and 5.1 (when a vulnerable Trust Agent has been deployed), and the Meetinghouse AEGIS SecureConnect Client use an insecure default Discretionar

How urgent is CVE-2007-1066?

Priority 30/100. No elevated risk signals yet.

Software pages

Cisco vulnerabilities

Related CVEs

CVE-2007-1068 HIGH 7.2 DOWNGRADE DOWNGRADE The (1) TTLS CHAP, (2) TTLS MSCHAP, (3) TTLS MSCHAPv2, (4) TTLS PAP, (5) MD5, (6) GTC, (7) LEAP, (8) PEAP MSCH
CVE-2007-1067 HIGH 7.2 DOWNGRADE DOWNGRADE Cisco Secure Services Client (CSSC) 4.x, Trust Agent 1.x and 2.x, Cisco Security Agent (CSA) 5.0 and 5.1 (when
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CVE-2007-1064 MEDIUM 6.8 DOWNGRADE DOWNGRADE Cisco Secure Services Client (CSSC) 4.x, Trust Agent 1.x and 2.x, Cisco Security Agent (CSA) 5.0 and 5.1 (when

References

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