Cisco Cisco Session Initiation Protocol (SIP) Software

Name: Cisco Cisco Session Initiation Protocol (SIP) Software
Brand: Cisco

productEU

A product tracked in the threat graph; the vulnerabilities below are known to affect it.

KEV-listed

by severity

1critical5high6medium3low

updated 2026-10-28

vulnerabilities (23)

Related CVEs.

sort

ID	severity	EPSS	exploitable	patched	published	affected
CVE-2020-25686US	low3.7OT elevated	5.47% (93rd)	Exploit	no fix	2021-01-20	—
CVE-2020-25687US	medium5.9	89.3% (100th)	—	no fix	2021-01-20	—
CVE-2020-25683US	medium5.9	88.8% (100th)	—	no fix	2021-01-20	—
CVE-2020-25681US	high8.1	84.1% (100th)	—	no fix	2021-01-20	—
CVE-2020-25682US	high8.1	75.1% (100th)	—	no fix	2021-01-20	—
CVE-2023-20078US	critical9.8	10.4% (96th)	—	no fix	2023-03-03	—
CVE-2023-20079US	high7.5	10.3% (96th)	—	no fix	2023-03-03	—
CVE-2022-20968US	high8.8	6.35% (94th)	—	no fix	2022-12-12	55 versions
CVE-2020-25684US	low3.7	4.16% (91st)	—	no fix	2021-01-20	—
CVE-2020-25685US	low3.7	2.23% (83rd)	—	no fix	2021-01-20	—
CVE-2023-20018US	medium6.5OT elevated	0.61% (49th)	—	no fix	2023-01-20	76 versions
CVE-2025-20350US	—	0.48% (41st)	—	no fix	2025-10-15	97 versions
CVE-2023-20265US	medium5.4	0.46% (40th)	—	no fix	2023-11-21	10 versions
CVE-2024-20445US	—	0.44% (38th)	—	no fix	2024-11-06	64 versions
CVE-2025-20336US	high7.5	0.39% (33rd)	—	no fix	2025-09-03	73 versions
CVE-2025-20335US	—	0.35% (29th)	—	no fix	2025-09-03	97 versions
CVE-2022-20660US	medium4.6OT elevated	0.35% (29th)	—	no fix	2022-01-14	2 versions
CVE-2021-1379US	—	0.33% (26th)	—	no fix	2024-11-18	81 versions
CVE-2024-20534US	—	0.29% (22nd)	—	no fix	2024-11-06	4 versions
CVE-2024-20533US	—	0.29% (22nd)	—	no fix	2024-11-06	4 versions
CVE-2025-20351US	—	0.29% (21st)	—	no fix	2025-10-15	99 versions
CVE-2021-34711US	medium5.5	0.27% (18th)	—	no fix	2021-10-06	—
CVE-2025-20158US	—	0.16% (5th)	—	no fix	2025-02-19	10 versions

The flaw types (CWEs) most of these CVEs share.

CWE-122Heap-based Buffer Overflow4 CVEs
CWE-787Out-of-bounds Write4 CVEs
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')4 CVEs
CWE-121Stack-based Buffer Overflow3 CVEs
CWE-200Exposure of Sensitive Information to an Unauthorized Actor3 CVEs
CWE-290Authentication Bypass by Spoofing3 CVEs
CWE-358Improperly Implemented Security Check for Standard3 CVEs
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer1 CVEs

Which sources assert this record, and when.

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