Security readout for executives and security teams
This is a low-severity curl/libcurl information leak. In specific TELNET use, the -t option or CURLOPT_TELNETOPTIONS can send uninitialized stack data to a TELNET server. The leak is only to the contacted server over clear text and requires that vulnerable feature to be used, limiting broad business urgency. Most organizations are exposed only where applications, scripts, appliances, or packaged products use vulnerable curl/libcurl versions with TELNET options. Ordinary HTTP, HTTPS, FTP, or API use is not described as affected in the provided sources. Treat as routine patch management unless TELNET-based automation with sensitive environments exists. It is a confidentiality issue with low CVSS severity, no cited active exploitation, and narrow conditions, but old curl versions should still be removed from managed assets. Mitigation focus: Upgrade curl/libcurl beyond the affected 7.7 through 7.76.1 range.; Apply distribution or vendor security updates for packaged curl dependencies.; Avoid TELNET option use with untrusted servers until updated..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-22898 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N1.61.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.1LowVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://hackerone.com/reports/1176461CVE reference · x_refsource_MISC
- https://curl.se/docs/CVE-2021-22898.htmlCVE reference · x_refsource_MISC
- https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bdeCVE reference · x_refsource_MISC
- [guacamole-issues] 20210618 [jira] [Created] (GUACAMOLE-1368) Latest docker image fails security scans.CVE reference · mailing-list, x_refsource_MLIST
- https://www.oracle.com//security-alerts/cpujul2021.htmlCVE reference · x_refsource_MISC
- FEDORA-2021-83fdddca0fCVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-5d21b90a30CVE reference · vendor-advisory, x_refsource_FEDORA
- [debian-lts-announce] 20210813 [SECURITY] [DLA 2734-1] curl security updateCVE reference · mailing-list, x_refsource_MLIST
- https://www.oracle.com/security-alerts/cpujan2022.htmlCVE reference · x_refsource_MISC
- https://www.oracle.com/security-alerts/cpuapr2022.htmlCVE reference · x_refsource_MISC
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfCVE reference · x_refsource_CONFIRM
- DSA-5197CVE reference · vendor-advisory, x_refsource_DEBIAN
- [debian-lts-announce] 20220828 [SECURITY] [DLA 3085-1] curl security updateCVE reference · mailing-list, x_refsource_MLIST
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.