High 7.5Known exploited (CISA KEV)Published Aug 30, 2010

CVE-2010-3035Cisco 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 cr…

Updated under an hour ago (2026-10-19 05:50 UTC)

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It affects cisco ios_xr. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Mar 25, 2022; federal agencies had to remediate by Apr 15, 2022. Treat that date as your deadline.

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Exploited in the last 30 days

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 (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Added to CISA KEV Mar 25, 2022; federal remediation due Apr 15, 2022Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 5.67% (percentile 93)
Assigned by: cisco
NVD analysis: Analyzed
Record last updated: Jan 12, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

cisco ios_xr cisco:ios_xr	from 3.4.0 through 3.9.1	NVD

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/61443vdb-entry, x-refsource-xf, vendor-advisory
http://www.securitytracker.com/id?1024371vdb-entry, x-refsource-sectrack, broken-link, third-party-advisory
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4411f.shtmlvendor-advisory, x-refsource-cisco, broken-link
http://mailman.nanog.org/pipermail/nanog/2010-August/024837.htmlmailing-list, x-refsource-mlist
http://secunia.com/advisories/41190third-party-advisory, x-refsource-secunia, broken-link
http://www.vupen.com/english/advisories/2010/2227vdb-entry, x-refsource-vupen, broken-link
http://osvdb.org/67696vdb-entry, x-refsource-osvdb, broken-link
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2010-3035us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.