CVE-2024-20474: A vulnerability in Internet Key Exchange version 2 (IKEv2) processing of Cisco Secure Client Software could al

Routine

MEDIUM 4.3DOWNGRADEDOWNGRADE

CVE-2024-20474 is a medium-severity flaw (CVSS 4.3) affecting anyconnect secure mobility client, secure client. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in Internet Key Exchange version 2 (IKEv2) processing of Cisco Secure Client Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) of Cisco Secure Client. This vulnerability is due to an integer underflow condition. An attacker could exploit this vulnerability by sending a crafted IKEv2 packet to an affected system. A successful exploit could allow the attacker to cause Cisco Secure Client

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-191
Published	2024-10-23
Last modified	2026-06-17

Publisher (CNA): Cisco Systems, Inc. · Vendor: cisco

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

Am I affected?

Timeline

2024-10-23 18:15 UTCPublished CVE record published
2026-06-17 07:07 UTCUpdated Record last modified

cisco anyconnect secure mobility client DOWNGRADE

Affected: 4.9.00086 · 4.9.01095 · 4.9.02028 · 4.9.03047 · 4.9.03049 · 4.9.04043 · 4.9.04053 · 4.9.05042

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.9.00086

1. Check installed version

apt-cache policy anyconnect-secure-mobility-client || rpm -q anyconnect-secure-mobility-client || anyconnect-secure-mobility-client --version

2. No fixed release: DOWNGRADE to a release before 4.9.00086 (Debian / Ubuntu)

apt-cache madison anyconnect-secure-mobility-client sudo apt install anyconnect-secure-mobility-client=<VERSION_BEFORE_4.9.00086> sudo apt-mark hold anyconnect-secure-mobility-client

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

dnf --showduplicates list anyconnect-secure-mobility-client sudo dnf downgrade anyconnect-secure-mobility-client-<VERSION_BEFORE_4.9.00086> sudo dnf versionlock add anyconnect-secure-mobility-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 secure client DOWNGRADE

Affected: 4.10.00093 · 4.10.01075 · 4.10.02086 · 4.10.03104 · 4.10.04065 · 4.10.04071 · 4.10.05085 · 4.10.05095

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.10.00093

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.10.00093 (Debian / Ubuntu)

apt-cache madison secure-client sudo apt install secure-client=<VERSION_BEFORE_4.10.00093> sudo apt-mark hold secure-client

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

dnf --showduplicates list secure-client sudo dnf downgrade secure-client-<VERSION_BEFORE_4.10.00093> sudo dnf versionlock add secure-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-2024-20474?

anyconnect secure mobility client: downgrade or apply the listed mitigation; secure client: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-20474 being exploited?

CVE-2024-20474 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-2024-20474 affect?

CVE-2024-20474 affects anyconnect secure mobility client, secure client. Severity is medium (CVSS 4.3). A vulnerability in Internet Key Exchange version 2 (IKEv2) processing of Cisco Secure Client Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) of Cisco Secure Client. This vulnerability is due to

How urgent is CVE-2024-20474?

Priority 27/100. No elevated risk signals yet.

Software pages

Cisco vulnerabilities

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References

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