Actively exploited in the wild
Cisco IOS Cross-Site Request Forgery Vulnerability
Cisco - IOS · Listed in the CISA KEV since 2026-07-13. This indicates confirmed attacks in production environments.
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CVE-2008-4128
MediumCVSS 4.3KEVExploitation Probability (EPSS)
Very high risk98th percentile - higher than 98% of all known CVEs
Summary
Multiple CSRF vulnerabilities in the HTTP Administration component of Cisco IOS 12.4 on the 871 Integrated Services Router allow remote attackers to execute arbitrary commands. The attack involves requests to the /level/15/exec/- URI with the "show privilege" command and to the /level/15/exec/-/configure/http URI with the "alias exec" command.
Risk Assessment
The risk is that an attacker can gain control over the router by executing arbitrary commands, potentially leading to network integrity and data confidentiality breaches.
Recommendation
It is recommended to upgrade Cisco IOS to a patched version and implement CSRF protection mechanisms such as anti-CSRF tokens or restrict access to the HTTP administration interface.
Other vulnerabilities in Cisco IOS
See all- CVE-2016-1478High
Cisco IOS versions 15.5(3)S3, 15.6(1)S2, 15.6(2)S1, and 15.6(2)T1 improperly dequeue invalid NTP packets, allowing remote attackers to cause a denial of service (interface wedge) by sending many crafted NTP packets.
- CVE-2015-0649High
Cisco IOS versions 12.2, 12.4, 15.0, 15.2, and 15.3 allow remote attackers to cause a denial of service (device reload) via malformed Common Industrial Protocol (CIP) TCP packets.
- CVE-2015-0647High
Cisco IOS versions 12.2, 12.4, 15.0, 15.2, and 15.3 allow remote attackers to cause a denial of service (device reload) via malformed Common Industrial Protocol (CIP) UDP packets.
- CVE-2015-0638High
In Cisco IOS versions 12.2, 12.4, 15.0, 15.2, and 15.3, configuring a VRF interface allows remote attackers to cause a denial of service (interface queue wedge) via crafted ICMPv4 packets.
- CVE-1999-0063Medium
Cisco IOS 12.0 and other versions can be crashed by malicious UDP packets to the syslog port.
- CVE-1999-0445Medium
In some versions of IOS 12.0 on Cisco routers running NAT, some packets may not be filtered by input access list filters.
- CVE-1999-0162Medium
The 'established' keyword in some Cisco IOS software allowed an attacker to bypass filtering.
- CVE-1999-0159Low
Attackers can crash a Cisco IOS router or device, provided they can get to an interactive prompt (such as a login). This applies to some IOS 9.x, 10.x, and 11.x releases.
- CVE-1999-0160High
Some classic Cisco IOS devices have a vulnerability in PPP CHAP authentication, allowing unauthorized PPP connections to be established.
- CVE-1999-0161High
In Cisco IOS 10.3, with the tacacs-ds or tacacs keyword, an extended IP access control list could bypass filtering.
Original NVD description (English source)
Multiple cross-site request forgery (CSRF) vulnerabilities in the HTTP Administration component in Cisco IOS 12.4 on the 871 Integrated Services Router allow remote attackers to execute arbitrary commands via (1) a certain "show privilege" command to the /level/15/exec/- URI, and (2) a certain "alias exec" command to the /level/15/exec/-/configure/http URI. NOTE: some of these details are obtained from third party information.