Cyber Threat Intelligence
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HIGH · CVSS 7.5 CISA Known Exploited Vulnerability

CVE-2010-3035

Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability

Cisco IOS XR

Cisco IOS XR 3.4.0 through 3.9.1, when BGP is enabled, does not properly handle unrecognized transitive attributes, which allows remote attackers to cause a denial of service (peering reset) via a crafted prefix announcement, as demonstrated in the wild in August 2010 with attribute type code 99, aka Bug ID CSCti62211.

CVSS
7.5
HIGH
EPSS
5.7%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
30 Aug 2010
NVD

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 25 March 2022. US federal agencies were required to remediate it by 15 April 2022.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 5.7%, which is higher than 92.8% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Frequently asked questions

Is CVE-2010-3035 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2010-3035.

What does CVE-2010-3035 affect?

CVE-2010-3035 affects Cisco IOS XR. Cisco IOS XR 3.4.0 through 3.9.1, when BGP is enabled, does not properly handle unrecognized transitive attributes, which allows remote attackers to cause a denial of service (peering reset) via a crafted prefix announcement, as demonstrated in the wild in August 2010 with attribute type code 99, aka Bug ID CSCti62211.

How severe is CVE-2010-3035?

CVE-2010-3035 is rated HIGH with a CVSS base score of 7.5. EPSS puts the probability of exploitation in the next 30 days at 5.7%, higher than 92.8% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 15 April 2022.

How should organisations respond to CVE-2010-3035?

Apply the vendor patch for Cisco IOS XR as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.