Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-1391

22
FAUCET Score

CVE-2021-1391 is a privilege escalation vulnerability in the dragonite debugger of Cisco IOS XE Software, affecting Cisco IOS and IOS XE products. It allows an authenticated, local attacker with privilege level 15 to escalate to root privileges. The vulnerability stems from residual development testing scripts that bypass the consent token mechanism. With a CVSS score of 6.7 (Medium), exploitation requires high privileges and local access, but can lead to complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
12.2\(6\)i1CPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.2\(6\)i1:*:*:*:*:*:*:*
15.0\(2\)se13aCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.0\(2\)se13a:*:*:*:*:*:*:*
15.1\(3\)svr1CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.1\(3\)svr1:*:*:*:*:*:*:*
15.1\(3\)svr2CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.1\(3\)svr2:*:*:*:*:*:*:*
15.1\(3\)svr3CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.1\(3\)svr3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.1MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
0.8
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.31%
Probability of exploitation in next 30 days
EPSS Percentile
23.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0031 is in the 70th percentile among its peer group of 3,720 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-FSM-Yj8qJbJc
Vendor Advisory