Reference page — cumulative record through Wednesday, October 7, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

Cisco IOS XR Software

Product reference — Cisco IOS XR Software by Cisco · sector: Network & Infrastructure. Cumulative disclosure record for this product across the archive.

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Product totals

Disclosures & known-exploited
	All-time	YTD
CVEs	11	7
KEV entries	4	0

Rate & severity
KEV/100	Med CVSS	Med EPSS	C	H	M	L
36.4	8.8	.0030	2	8	1	0

KEV/100 = KEV entries ÷ CVEs × 100. Med CVSS / Med EPSS are medians over this product's disclosures. C/H/M/L = disclosures by CVSS severity band.

Monthly disclosures

Trend (by first-seen month, full archive): ▂▁▁▁▁▁▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁

Last 12 months (new CVEs by first-seen day)
Month	New CVEs
2025-11	0
2025-12	0
2026-01	0
2026-02	0
2026-03	0
2026-04	0
2026-05	0
2026-06	0
2026-07	0
2026-08	0
2026-09	7
2026-10	0

Notable CVEs

Ranked by the published formula: KEV → EPSS → CVSS → CVE ID.

Notable (ranked)
CVE	CVSS	EPSS %ile	Severity	KEV	First seen
CVE-2020-3118	8.8	96.0	HIGH	YES	2020-02-05
CVE-2022-20821	6.5	95.9	MEDIUM	YES	2022-05-26
CVE-2020-3566	8.6	89.4	HIGH	YES	2020-08-29
CVE-2020-3569	8.6	88.2	HIGH	YES	2020-09-23
CVE-2026-20274	9.8	52.8	CRITICAL	—	2026-09-02
CVE-2026-20279	9.8	20.9	CRITICAL	—	2026-09-02
CVE-2026-20278	8.8	20.6	HIGH	—	2026-09-02
CVE-2026-20280	8.8	19.9	HIGH	—	2026-09-02
CVE-2026-20276	8.6	17.2	HIGH	—	2026-09-02
CVE-2026-20277	8.2	12.9	HIGH	—	2026-09-02
CVE-2026-20275	8.8	8.4	HIGH	—	2026-09-02

Recent CVEs

Most recently seen
CVE	CVSS	EPSS %ile	Severity	KEV	First seen
CVE-2026-20280	8.8	19.9	HIGH	—	2026-09-02
CVE-2026-20277	8.2	12.9	HIGH	—	2026-09-02
CVE-2026-20279	9.8	20.9	CRITICAL	—	2026-09-02
CVE-2026-20278	8.8	20.6	HIGH	—	2026-09-02
CVE-2026-20275	8.8	8.4	HIGH	—	2026-09-02
CVE-2026-20276	8.6	17.2	HIGH	—	2026-09-02
CVE-2026-20274	9.8	52.8	CRITICAL	—	2026-09-02
CVE-2022-20821	6.5	95.9	MEDIUM	YES	2022-05-26
CVE-2020-3569	8.6	88.2	HIGH	YES	2020-09-23
CVE-2020-3566	8.6	89.4	HIGH	YES	2020-08-29
CVE-2020-3118	8.8	96.0	HIGH	YES	2020-02-05

KEV entries

CISA Known Exploited Vulnerabilities (newest addition first)
CVE	KEV added	CVSS	EPSS %ile	Severity
CVE-2022-20821	2022-05-23	6.5	95.9	MEDIUM
CVE-2020-3569	2021-11-03	8.6	88.2	HIGH
CVE-2020-3566	2021-11-03	8.6	89.4	HIGH
CVE-2020-3118	2021-11-03	8.8	96.0	HIGH

Vendor: Cisco — all products and the full vendor record.

Methodology

A product is a (vendor, product) pair as named in the affected-product data. Rate statistics are arithmetic over published figures. Counts key to first-seen day. Raw counts are not comparable across products; this is a reference page assembled from the public record, not a ranking by our judgment.

Sources. CVE Program (cvelistV5), NVD (NIST), CISA KEV, FIRST EPSS.