CVE-2026-20028
CVE-2026-20028: 2 tracked advisory records across Cisco. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Cisco
2 advisories- Advisory severityHigh
High [CVE-2026-20028 +21] Cisco Advance Notification for Publication of August 5, 2026, Security Advisories
cisco-sa-notice-L4XfJg8SSource published Source updated
This bulletin covers 22 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
On August 5, 2026, the Cisco Product Security Incident Response Team (PSIRT) published the following advisories: Cisco Security Advisory CVE ID Security Impact Rating CVSS Base Score Cisco Catalyst SD-WAN Software Security Hardening Release: August 2026 CVE-2026-20303 CVE-2026-20304 CVE-2026-20310 CVE-2026-20312 CVE-2026-20313 Critical 9.9 Cisco IOS XE Software Security Hardening Release: August 2026 CVE-2026-20267 CVE-2026-20268 CVE-2026-20269 CVE-2026-20270 CVE-2026-20271 CVE-2026-20272 CVE-2026-20273 Critical 9.8 Cisco Integrated Management Controller Argument Injection Vulnerabilities CVE-2026-20200 CVE-2026-20288 High 8.8 Cisco IOS Software and IOS XE Software Extensible…
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- On August 5, 2026, the Cisco Product Security Incident Response Team (PSIRT) will publish advisories to disclose security vulnerability information along with fixed software releases for the following Cisco products: Catalyst SD-WAN Integrated Management Controller (IMC) IOS Software IOS XE Software RoomOS Terminal Services Agent To fully remediate vulnerabilities to be disclosed on August 5, 2026, Cisco strongly recommends that customers upgrade to the fixed software indicated in the advisories.
- Advisory severityMedium5.0
Medium [CVE-2026-20028] Cisco Terminal Services Agent Firewall Rules Bypass Vulnerability
cisco-sa-ts-agent-fw-bypass-MYBTMrevSource published Source updated
A vulnerability in the network driver of Cisco Terminal Service (TS) Agent could allow an authenticated, remote attacker to bypass firewall rules that are associated with the account of the attacker. This vulnerability is due to an incorrect mapping of network connections to user accounts. An attacker with at least user-level credentials could exploit this vulnerability by sending crafted network traffic to an affected device. A successful exploit could allow the attacker to inherit the firewall rules associated with a different user in the system. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
- Affected products in this advisory
- Terminal Services Agent
- Source-reported affected versions
- Scope: At the time of publication, this vulnerability affected Cisco TS Agent, regardless of device configuration.
- Release Earlier than 1.4.3 (first fixed: 1.4.3)
- Source-reported fixed versions
- 1.4.3
- Mitigation guidance
- Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
- Earlier than 1.4.3: upgrade to 1.4.3.
- Workarounds
- There are no workarounds that address this vulnerability.
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