Cisco IOS XR known exploited vulnerabilities, ranked
CISA lists 6 Cisco IOS XR CVEs as exploited in the wild. 0 were added in the last 12 months and 0 are known to be used in ransomware. The table ranks all of them by EPSS, FIRST's estimate of the chance a CVE is exploited in the next 30 days, so the first rows are the ones to patch first.
Patch these first
- CVE-2020-3118: EPSS 11.7%, added 2021-11-03
- CVE-2022-20821: EPSS 11.5%, added 2022-05-23
- CVE-2010-3035: EPSS 5.7%, added 2022-03-25
- CVE-2020-3566: EPSS 3.7%, added 2021-11-03
- CVE-2020-3569: EPSS 3.3%, added 2021-11-03
All 6 Cisco IOS XR CVEs in CISA KEV, by EPSS
| # | CVE | Flaw | EPSS | Ransomware | Added | Federal due |
|---|---|---|---|---|---|---|
| 1 | CVE-2020-3118 | IOS XR Software Discovery Protocol Format String | 11.7% | – | 2021-11-03 | 2022-05-03 |
| 2 | CVE-2022-20821 | IOS XR Open Port | 11.5% | – | 2022-05-23 | 2022-06-13 |
| 3 | CVE-2010-3035 | IOS XR Border Gateway Protocol (BGP) Denial-of-Service | 5.7% | – | 2022-03-25 | 2022-04-15 |
| 4 | CVE-2020-3566 | IOS XR Software DVMRP Memory Exhaustion | 3.7% | – | 2021-11-03 | 2022-05-03 |
| 5 | CVE-2020-3569 | IOS XR Software DVMRP Memory Exhaustion | 3.3% | – | 2021-11-03 | 2022-05-03 |
| 6 | CVE-2009-2055 | IOS XR Border Gateway Protocol (BGP) Denial-of-Service | 3.3% | – | 2022-03-25 | 2022-04-15 |
EPSS changes daily; a CVE with a low EPSS that is in KEV is still exploited somewhere. Federal due dates bind US federal civilian agencies; everyone else can use them as a priority hint.
Sources: CISA KEV, FIRST EPSS.
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