Trending
CVE-2026-20272

CVE detail

CVE-2026-20272

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20272 are related to issues with improper neutralization of special elements that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-74.

CVSS 9.8 · CriticalBuzz score 38.8

Buzz score

Why this CVE is surfacing

Buzz score total 38.8

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 20.8 · diversity 18.0 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

20.8

7 evidence mentions in the snapshot

Diversity score

18.0

5 sources across 3 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 7; within the 30d window
Peak daily: 4; highest bucket

Evidence

Source links by recency

Newest mentions first

7 source links · newest first

⚡ Weekly Recap: AI Goes Rogue, Metabase 0-Day, MCP Supply-Chain Attacks, and Router BackdoorsThe Hacker News
sed, or already being poked at in the wild. Check the list, patch what you have, and hit the ones marked urgent first — CVE-2026-34348 , CVE-2026-18497 (stb TrueType), CVE-2026-63508, CVE-2026-56162, CVE-2026-65667, CVE-2026-50515, CVE-2026-62830, CVE-2026-59115, CVE-2026-50481 (Microsoft Windows), CVE-2026-64638 (WordPress), CVE-2026-64564 (Linux SCTP
newsthehackernews.comAug 10, 2026, 3:00 PM
Cisco Patches 12 SD-WAN and IOS XE Flaws, Including Three 9.9 CVSS Score BugsThe Hacker News
the necessary updates for optimal protection. The vulnerabilities impacting Catalyst SD-WAN Software are listed below - CVE-2026-20303 (CVSS score: 9.9) - An improper input validation vulnerability (which also covers path traversals) CVE-2026-20304 (CVSS score: 9.9) - An improper access control vulnerability CVE-2026-20310 (CVSS score: 9.9) - An improp
newsthehackernews.comAug 6, 2026, 5:13 PM
Cisco Patches Critical SD-WAN, IOS XE, FMC VulnerabilitiesSecurityWeek
the CVEs were assigned to multiple weaknesses grouped by the underlying vulnerability class. Three of the CVEs, namely CVE-2026-20303, CVE-2026-20304, and CVE-2026-20310, have a CVSS score of 9.9 and are described as improper input validation, improper access control, and improper link resolution before file access. The remaining two, CVE-2026-20312 a
newswww.securityweek.comAug 6, 2026, 7:20 AM
https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identificationwww.cve.org
No excerpt available.
Vendor Advisorywww.cve.orgAug 5, 2026, 5:16 PM
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-iosxe-V8NMuMZJsec.cloudapps.cisco.com
No excerpt available.
Vendor Advisorysec.cloudapps.cisco.comAug 5, 2026, 5:16 PM
Cisco Advance Notification for Publication of August 5, 2026, Security AdvisoriesCisco Security Advisories
ry 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-
vendorsec.cloudapps.cisco.comAug 5, 2026, 4:01 PM
Cisco IOS XE Software Security Hardening Release: August 2026Cisco Security Advisories
m/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-iosxe-V8NMuMZJ Security Impact Rating: Critical CVE: CVE-2026-20267,CVE-2026-20268,CVE-2026-20269,CVE-2026-20270,CVE-2026-20271,CVE-2026-20272,CVE-2026-20273
vendorsec.cloudapps.cisco.comAug 5, 2026, 4:00 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

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External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2026-20272.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:o:cisco:ios_xeSearch this product on Shodan

Exact CVE query

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Shodan's exact vuln: filter is separate from the product searches above and requires an eligible paid Shodan plan.

vuln:CVE-2026-20272Search this CVE on Shodan

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Metadata

Canonical fields

NVD status

Modified

Published

Aug 5, 2026

Modified

Aug 14, 2026

Official record

Authoritative NVD record

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE IDs

Vendor classifications

How this vector reads

CVSS 3.1 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Network. The vulnerable system can be reached across network boundaries.
Attack Complexity (AC): Low. No special conditions beyond the attacker-controlled steps are required.
Privileges Required (PR): None. The attacker needs no privileges on the vulnerable system.
User Interaction (UI): None. Exploitation does not require another user to act.
Scope (S): Unchanged. Impacts remain within the vulnerable security authority.
Confidentiality Impact (C): High. There is a total or serious impact to this security property.
Integrity Impact (I): High. There is a total or serious impact to this security property.
Availability Impact (A): High. There is a total or serious impact to this security property.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses